91339954 divided by 398 
The aim is to understand the frequency of 398 in 91339954.

Advancing to step 1:
9 divided by 398 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 398

Advancing to step 2:
If we divide 91 by 398, we get 0 and a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Fetch the next digit (3) from the dividend, attach it to 91 and continue: 913 / 398

Going ahead to step 3:
The number 398 fits into 913 2 times, leaving a remainder of 117.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 796 from 913 leaves us with 117.
Take the next digit (3) from the dividend and append it to 117, then repeat: 1173 / 398

On to step 4:
398 can be fit into 1173 2 times, resulting in a remainder of 377.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Subtracting 796 from 1173 leaves us with 377.
Fetch the next digit (9) from the dividend, attach it to 377 and continue: 3779 / 398

Advancing to step 5:
If we divide 3779 by 398, we get 9 and a remainder of 197.
Record the quotient 9 as the next digit in the result. 
Result so far: 229.0
The remainder is 197 after subtracting 3582 from 3779.
Grab the next digit (9) from the dividend, add it to 197, then carry on: 1979 / 398

Moving on to step 6:
1979 divided by 398 is 4 with a remainder of 387.
The number 4 becomes the next digit in our result. 
Result so far: 2294.0
If we subtract 1592 from 1979, we get 387.
Fetch the next digit (5) from the dividend, attach it to 387 and continue: 3875 / 398

Going ahead to step 7:
When dividing 3875 by 398, we get 9 with a remainder of 293.
Use 9 as the next digit of our solution. 
Result so far: 22949.0
If we subtract 3582 from 3875, we get 293.
Bring next digit (4) of the dividend behind the 293 and repeat the process: 2934 / 398

Step 8:
If we divide 2934 by 398, we get 7 and a remainder of 148.
Put 7 as the next digit of the answer. 
Result so far: 229497.0
If we subtract 2786 from 2934, we get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Advancing to step 9:
When dividing 1480 by 398, we get 3 with a remainder of 286.
The number 3 becomes the next digit in our result. 
Result so far: 229497.3
The remainder is 286 after subtracting 1194 from 1480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Going ahead to step 10:
When dividing 2860 by 398, we get 7 with a remainder of 74.
Record the quotient 7 as the next digit in the result. 
Result so far: 229497.37
If we take 2786 away from 2860, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 11:
398 can be fit into 740 1 times, resulting in a remainder of 342.
The next digit of our result is 1. 
Result so far: 229497.371
If we take 398 away from 740, we end up with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Advancing to step 12:
When dividing 3420 by 398, we get 8 with a remainder of 236.
Use 8 as the next digit of our solution. 
Result so far: 229497.3718
The remainder is 236 after subtracting 3184 from 3420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Step 13:
If we divide 2360 by 398, we get 5 and a remainder of 370.
Write down 5 as next digit of the result. 
Result so far: 229497.37185
Subtracting 1990 from 2360 leaves us with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 14:
398 goes into 3700 9 times with a remainder of 118.
Record the quotient 9 as the next digit in the result. 
Result so far: 229497.371859
Subtracting 3582 from 3700 leaves us with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Step 15:
When dividing 1180 by 398, we get 2 with a remainder of 384.
The next digit of our result is 2. 
Result so far: 229497.3718592
If we take 796 away from 1180, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Step 16:
3840 divided by 398 is 9 with a remainder of 258.
The number 9 becomes the next digit in our result. 
Result so far: 229497.37185929
If we take 3582 away from 3840, we end up with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

The quotient of the division is 229497.37185929, and the remainder is 2.58e-07.