91398438 divided by 584 
The aim is to understand the frequency of 584 in 91398438.

Let's proceed to step 1:
9 divided by 584 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 584

On to step 2:
91 divided by 584 is 0 with a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Include the next digit (3) from the dividend after 91, then repeat: 913 / 584

Going ahead to step 3:
584 can be fit into 913 1 times, resulting in a remainder of 329.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 584 from 913 to get 329.
Include the next digit (9) from the dividend after 329, then repeat: 3299 / 584

Step 4:
The number 584 fits into 3299 5 times, leaving a remainder of 379.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 2920 from 3299, we get 379.
Grab the next digit (8) from the dividend, add it to 379, then carry on: 3798 / 584

Advancing to step 5:
When dividing 3798 by 584, we get 6 with a remainder of 294.
Use 6 as the next digit of our solution. 
Result so far: 156.0
Deduct 3504 from 3798 and we're left with 294.
Bring next digit (4) of the dividend behind the 294 and repeat the process: 2944 / 584

Let's proceed to step 6:
584 goes into 2944 5 times with a remainder of 24.
Use 5 as the next digit of our solution. 
Result so far: 1565.0
If we take 2920 away from 2944, we end up with 24.
Include the next digit (3) from the dividend after 24, then repeat: 243 / 584

Going ahead to step 7:
584 goes into 243 0 times with a remainder of 243.
Use 0 as the next digit of our solution. 
Result so far: 15650.0
The remainder is 243 after subtracting 0 from 243.
Bring next digit (8) of the dividend behind the 243 and repeat the process: 2438 / 584

On to step 8:
When dividing 2438 by 584, we get 4 with a remainder of 102.
Put 4 as the next digit of the answer. 
Result so far: 156504.0
Deduct 2336 from 2438 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 9:
584 goes into 1020 1 times with a remainder of 436.
Put 1 as the next digit of the answer. 
Result so far: 156504.1
The remainder is 436 after subtracting 584 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Moving on to step 10:
If we divide 4360 by 584, we get 7 and a remainder of 272.
Put 7 as the next digit of the answer. 
Result so far: 156504.17
The remainder is 272 after subtracting 4088 from 4360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

On to step 11:
The number 584 fits into 2720 4 times, leaving a remainder of 384.
Use 4 as the next digit of our solution. 
Result so far: 156504.174
If we take 2336 away from 2720, 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.

Advancing to step 12:
3840 divided by 584 is 6 with a remainder of 336.
Write down 6 as next digit of the result. 
Result so far: 156504.1746
If we subtract 3504 from 3840, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Step 13:
The number 584 fits into 3360 5 times, leaving a remainder of 440.
Put 5 as the next digit of the answer. 
Result so far: 156504.17465
Subtracting 2920 from 3360 leaves us with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 14:
584 can be fit into 4400 7 times, resulting in a remainder of 312.
Put 7 as the next digit of the answer. 
Result so far: 156504.174657
Deduct 4088 from 4400 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 15:
If we divide 3120 by 584, we get 5 and a remainder of 200.
The next digit of our result is 5. 
Result so far: 156504.1746575
Subtracting 2920 from 3120 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 16:
2000 divided by 584 is 3 with a remainder of 248.
Put 3 as the next digit of the answer. 
Result so far: 156504.17465753
If we take 1752 away from 2000, we end up with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

The final outcome is 156504.17465753, with a leftover of 2.48e-07.