We look at the division of 946165 by 91 
The aim is to understand the frequency of 91 in 946165.

Step 1:
91 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 91

Advancing to step 2:
When dividing 94 by 91, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 91 from 94 and we're left with 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 91

Going ahead to step 3:
91 goes into 36 0 times with a remainder of 36.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 36 to get 36.
Take the next digit (1) from the dividend and append it to 36, then repeat: 361 / 91

Going ahead to step 4:
91 goes into 361 3 times with a remainder of 88.
Put 3 as the next digit of the answer. 
Result so far: 103.0
Subtracting 273 from 361 leaves us with 88.
Take the next digit (6) from the dividend and append it to 88, then repeat: 886 / 91

Advancing to step 5:
When dividing 886 by 91, we get 9 with a remainder of 67.
Write down 9 as next digit of the result. 
Result so far: 1039.0
Subtracting 819 from 886 leaves us with 67.
Bring next digit (5) of the dividend behind the 67 and repeat the process: 675 / 91

Advancing to step 6:
91 goes into 675 7 times with a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 10397.0
If we take 637 away from 675, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
380 divided by 91 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 10397.4
Deduct 364 from 380 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
91 can be fit into 160 1 times, resulting in a remainder of 69.
The next digit of our result is 1. 
Result so far: 10397.41
Deduct 91 from 160 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 9:
If we divide 690 by 91, we get 7 and a remainder of 53.
The number 7 becomes the next digit in our result. 
Result so far: 10397.417
If we take 637 away from 690, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 10:
The number 91 fits into 530 5 times, leaving a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 10397.4175
Deduct 455 from 530 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 11:
91 can be fit into 750 8 times, resulting in a remainder of 22.
The next digit of our result is 8. 
Result so far: 10397.41758
The remainder is 22 after subtracting 728 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 12:
When dividing 220 by 91, we get 2 with a remainder of 38.
Record the quotient 2 as the next digit in the result. 
Result so far: 10397.417582
If we subtract 182 from 220, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 13:
The number 91 fits into 380 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 10397.4175824
Subtract 364 from 380 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 14:
If we divide 160 by 91, we get 1 and a remainder of 69.
The next digit of our result is 1. 
Result so far: 10397.41758241
The remainder is 69 after subtracting 91 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

After the division, we end up with 10397.41758241 and a remainder of 6.9e-08.