We look at the division of 90749617 by 913 
The aim is to understand the frequency of 913 in 90749617.

Step 1:
The number 913 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 913

Going ahead to step 2:
If we divide 90 by 913, we get 0 and a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Grab the next digit (7) from the dividend, add it to 90, then carry on: 907 / 913

Going ahead to step 3:
If we divide 907 by 913, we get 0 and a remainder of 907.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 907 and we're left with 907.
Append the next digit (4) from the dividend to 907 and continue with: 9074 / 913

Advancing to step 4:
When dividing 9074 by 913, we get 9 with a remainder of 857.
The next digit of our result is 9. 
Result so far: 9.0
The remainder is 857 after subtracting 8217 from 9074.
Fetch the next digit (9) from the dividend, attach it to 857 and continue: 8579 / 913

Moving on to step 5:
913 goes into 8579 9 times with a remainder of 362.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
Subtract 8217 from 8579 to get 362.
Fetch the next digit (6) from the dividend, attach it to 362 and continue: 3626 / 913

On to step 6:
913 can be fit into 3626 3 times, resulting in a remainder of 887.
Use 3 as the next digit of our solution. 
Result so far: 993.0
Subtract 2739 from 3626 to get 887.
Include the next digit (1) from the dividend after 887, then repeat: 8871 / 913

Step 7:
913 goes into 8871 9 times with a remainder of 654.
The next digit of our result is 9. 
Result so far: 9939.0
The remainder is 654 after subtracting 8217 from 8871.
Bring next digit (7) of the dividend behind the 654 and repeat the process: 6547 / 913

Going ahead to step 8:
6547 divided by 913 is 7 with a remainder of 156.
The next digit of our result is 7. 
Result so far: 99397.0
Subtracting 6391 from 6547 leaves us with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 9:
1560 divided by 913 is 1 with a remainder of 647.
The number 1 becomes the next digit in our result. 
Result so far: 99397.1
Subtracting 913 from 1560 leaves us with 647.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6470, and continue the process.

Moving on to step 10:
The number 913 fits into 6470 7 times, leaving a remainder of 79.
The number 7 becomes the next digit in our result. 
Result so far: 99397.17
Subtract 6391 from 6470 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 11:
The number 913 fits into 790 0 times, leaving a remainder of 790.
Put 0 as the next digit of the answer. 
Result so far: 99397.17
Subtracting 0 from 790 leaves us with 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Going ahead to step 12:
913 can be fit into 7900 8 times, resulting in a remainder of 596.
Write down 8 as next digit of the result. 
Result so far: 99397.1708
The remainder is 596 after subtracting 7304 from 7900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

On to step 13:
913 goes into 5960 6 times with a remainder of 482.
Record the quotient 6 as the next digit in the result. 
Result so far: 99397.17086
If we take 5478 away from 5960, we end up with 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Moving on to step 14:
The number 913 fits into 4820 5 times, leaving a remainder of 255.
The number 5 becomes the next digit in our result. 
Result so far: 99397.170865
If we subtract 4565 from 4820, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Going ahead to step 15:
913 goes into 2550 2 times with a remainder of 724.
The next digit of our result is 2. 
Result so far: 99397.1708652
The remainder is 724 after subtracting 1826 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

On to step 16:
When dividing 7240 by 913, we get 7 with a remainder of 849.
Record the quotient 7 as the next digit in the result. 
Result so far: 99397.17086527
Subtract 6391 from 7240 to get 849.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8490, and continue the process.

The quotient of the division is 99397.17086527, and the remainder is 8.49e-07.