We look at the division of 91209754 by 865 
The aim is to understand the frequency of 865 in 91209754.

Step 1:
865 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 865

Moving on to step 2:
If we divide 91 by 865, we get 0 and a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Bring next digit (2) of the dividend behind the 91 and repeat the process: 912 / 865

Moving on to step 3:
When dividing 912 by 865, we get 1 with a remainder of 47.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 865 from 912 to get 47.
Take the next digit (0) from the dividend and append it to 47, then repeat: 470 / 865

Step 4:
865 goes into 470 0 times with a remainder of 470.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 470 leaves us with 470.
Append the next digit (9) from the dividend to 470 and continue with: 4709 / 865

Step 5:
865 can be fit into 4709 5 times, resulting in a remainder of 384.
Put 5 as the next digit of the answer. 
Result so far: 105.0
Deduct 4325 from 4709 and we're left with 384.
Fetch the next digit (7) from the dividend, attach it to 384 and continue: 3847 / 865

Let's proceed to step 6:
When dividing 3847 by 865, we get 4 with a remainder of 387.
Record the quotient 4 as the next digit in the result. 
Result so far: 1054.0
The remainder is 387 after subtracting 3460 from 3847.
Include the next digit (5) from the dividend after 387, then repeat: 3875 / 865

Step 7:
3875 divided by 865 is 4 with a remainder of 415.
Record the quotient 4 as the next digit in the result. 
Result so far: 10544.0
Deduct 3460 from 3875 and we're left with 415.
Bring next digit (4) of the dividend behind the 415 and repeat the process: 4154 / 865

Advancing to step 8:
865 can be fit into 4154 4 times, resulting in a remainder of 694.
Write down 4 as next digit of the result. 
Result so far: 105444.0
The remainder is 694 after subtracting 3460 from 4154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6940, and continue the process.

On to step 9:
If we divide 6940 by 865, we get 8 and a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 105444.8
The remainder is 20 after subtracting 6920 from 6940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
The number 865 fits into 200 0 times, leaving a remainder of 200.
The next digit of our result is 0. 
Result so far: 105444.8
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 11:
When dividing 2000 by 865, we get 2 with a remainder of 270.
Use 2 as the next digit of our solution. 
Result so far: 105444.802
The remainder is 270 after subtracting 1730 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Going ahead to step 12:
2700 divided by 865 is 3 with a remainder of 105.
Record the quotient 3 as the next digit in the result. 
Result so far: 105444.8023
Subtracting 2595 from 2700 leaves us with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Moving on to step 13:
865 goes into 1050 1 times with a remainder of 185.
Write down 1 as next digit of the result. 
Result so far: 105444.80231
Subtracting 865 from 1050 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 14:
If we divide 1850 by 865, we get 2 and a remainder of 120.
Record the quotient 2 as the next digit in the result. 
Result so far: 105444.802312
Deduct 1730 from 1850 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 15:
1200 divided by 865 is 1 with a remainder of 335.
The number 1 becomes the next digit in our result. 
Result so far: 105444.8023121
Subtract 865 from 1200 to get 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Step 16:
When dividing 3350 by 865, we get 3 with a remainder of 755.
Use 3 as the next digit of our solution. 
Result so far: 105444.80231213
If we take 2595 away from 3350, we end up with 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

In conclusion, the division gives 105444.80231213 with a balance of 7.55e-07.