We look at the division of 514418 by 91 
The aim is to understand the frequency of 91 in 514418.

Moving on to step 1:
91 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 91

On to step 2:
If we divide 51 by 91, we get 0 and a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Append the next digit (4) from the dividend to 51 and continue with: 514 / 91

Moving on to step 3:
514 divided by 91 is 5 with a remainder of 59.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 59 after subtracting 455 from 514.
Take the next digit (4) from the dividend and append it to 59, then repeat: 594 / 91

Step 4:
The number 91 fits into 594 6 times, leaving a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 56.0
Subtracting 546 from 594 leaves us with 48.
Bring next digit (1) of the dividend behind the 48 and repeat the process: 481 / 91

Going ahead to step 5:
If we divide 481 by 91, we get 5 and a remainder of 26.
Record the quotient 5 as the next digit in the result. 
Result so far: 565.0
Subtract 455 from 481 to get 26.
Take the next digit (8) from the dividend and append it to 26, then repeat: 268 / 91

Advancing to step 6:
The number 91 fits into 268 2 times, leaving a remainder of 86.
The number 2 becomes the next digit in our result. 
Result so far: 5652.0
Deduct 182 from 268 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 7:
When dividing 860 by 91, we get 9 with a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 5652.9
Subtracting 819 from 860 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 8:
91 can be fit into 410 4 times, resulting in a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 5652.94
If we subtract 364 from 410, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 9:
460 divided by 91 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 5652.945
Subtract 455 from 460 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
91 goes into 50 0 times with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 5652.945
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 11:
500 divided by 91 is 5 with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 5652.94505
Subtracting 455 from 500 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 12:
91 goes into 450 4 times with a remainder of 86.
Use 4 as the next digit of our solution. 
Result so far: 5652.945054
Deduct 364 from 450 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 13:
860 divided by 91 is 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 5652.9450549
Subtracting 819 from 860 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 14:
91 can be fit into 410 4 times, resulting in a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 5652.94505494
If we take 364 away from 410, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final outcome is 5652.94505494, with a leftover of 4.6e-08.