Let's divide 915219 by 91
The aim is to understand the frequency of 91 in 915219.

Going ahead to step 1:
9 divided by 91 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 91

Going ahead to step 2:
91 goes into 91 1 times with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 91 from 91 leaves us with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 91

Going ahead to step 3:
If we divide 5 by 91, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 91

Let's proceed to step 4:
91 goes into 52 0 times with a remainder of 52.
Write down 0 as next digit of the result. 
Result so far: 100.0
If we take 0 away from 52, we end up with 52.
Fetch the next digit (1) from the dividend, attach it to 52 and continue: 521 / 91

Advancing to step 5:
If we divide 521 by 91, we get 5 and a remainder of 66.
Put 5 as the next digit of the answer. 
Result so far: 1005.0
Subtract 455 from 521 to get 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 91

Moving on to step 6:
91 can be fit into 669 7 times, resulting in a remainder of 32.
The number 7 becomes the next digit in our result. 
Result so far: 10057.0
Subtract 637 from 669 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 7:
91 can be fit into 320 3 times, resulting in a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 10057.3
Subtract 273 from 320 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 8:
If we divide 470 by 91, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 10057.35
The remainder is 15 after subtracting 455 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
The number 91 fits into 150 1 times, leaving a remainder of 59.
Record the quotient 1 as the next digit in the result. 
Result so far: 10057.351
Subtract 91 from 150 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 10:
When dividing 590 by 91, we get 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 10057.3516
Deduct 546 from 590 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 11:
440 divided by 91 is 4 with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 10057.35164
Subtracting 364 from 440 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 12:
760 divided by 91 is 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 10057.351648
Deduct 728 from 760 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 13:
91 goes into 320 3 times with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 10057.3516483
If we take 273 away from 320, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 14:
470 divided by 91 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 10057.35164835
The remainder is 15 after subtracting 455 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 10057.35164835 with a remainder of 1.5e-08.