We're dividing 396010 by 91 
The aim is to understand the frequency of 91 in 396010.

Moving on to step 1:
3 divided by 91 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 91

On to step 2:
The number 91 fits into 39 0 times, leaving a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Grab the next digit (6) from the dividend, add it to 39, then carry on: 396 / 91

Moving on to step 3:
If we divide 396 by 91, we get 4 and a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 364 from 396 to get 32.
Include the next digit (0) from the dividend after 32, then repeat: 320 / 91

Step 4:
If we divide 320 by 91, we get 3 and a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
If we subtract 273 from 320, we get 47.
Include the next digit (1) from the dividend after 47, then repeat: 471 / 91

On to step 5:
The number 91 fits into 471 5 times, leaving a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 435.0
If we subtract 455 from 471, we get 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 91

Going ahead to step 6:
When dividing 160 by 91, we get 1 with a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 4351.0
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.

Going ahead to step 7:
If we divide 690 by 91, we get 7 and a remainder of 53.
Record the quotient 7 as the next digit in the result. 
Result so far: 4351.7
Subtracting 637 from 690 leaves us 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.

On to step 8:
When dividing 530 by 91, we get 5 with a remainder of 75.
Put 5 as the next digit of the answer. 
Result so far: 4351.75
If we take 455 away from 530, we end up 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.

Moving on to step 9:
If we divide 750 by 91, we get 8 and a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 4351.758
Subtract 728 from 750 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 10:
220 divided by 91 is 2 with a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 4351.7582
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.

On to step 11:
The number 91 fits into 380 4 times, leaving a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4351.75824
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.

Step 12:
160 divided by 91 is 1 with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 4351.758241
If we take 91 away from 160, we end up 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 13:
The number 91 fits into 690 7 times, leaving a remainder of 53.
Record the quotient 7 as the next digit in the result. 
Result so far: 4351.7582417
Subtract 637 from 690 to get 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 14:
If we divide 530 by 91, we get 5 and a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 4351.75824175
Subtract 455 from 530 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

The quotient of the division is 4351.75824175, and the remainder is 7.5e-08.