We divide 678397 by 91
The aim is to understand the frequency of 91 in 678397.

Let's proceed to step 1:
91 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 91

On to step 2:
If we divide 67 by 91, we get 0 and a remainder of 67.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 67 leaves us with 67.
Fetch the next digit (8) from the dividend, attach it to 67 and continue: 678 / 91

On to step 3:
91 can be fit into 678 7 times, resulting in a remainder of 41.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 637 from 678 and we're left with 41.
Fetch the next digit (3) from the dividend, attach it to 41 and continue: 413 / 91

Going ahead to step 4:
413 divided by 91 is 4 with a remainder of 49.
Use 4 as the next digit of our solution. 
Result so far: 74.0
If we take 364 away from 413, we end up with 49.
Bring next digit (9) of the dividend behind the 49 and repeat the process: 499 / 91

Let's proceed to step 5:
The number 91 fits into 499 5 times, leaving a remainder of 44.
Use 5 as the next digit of our solution. 
Result so far: 745.0
If we take 455 away from 499, we end up with 44.
Grab the next digit (7) from the dividend, add it to 44, then carry on: 447 / 91

Advancing to step 6:
When dividing 447 by 91, we get 4 with a remainder of 83.
Put 4 as the next digit of the answer. 
Result so far: 7454.0
Deduct 364 from 447 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 7:
830 divided by 91 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 7454.9
Subtract 819 from 830 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 8:
91 goes into 110 1 times with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 7454.91
Deduct 91 from 110 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
91 goes into 190 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 7454.912
Deduct 182 from 190 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
If we divide 80 by 91, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 7454.912
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 11:
The number 91 fits into 800 8 times, leaving a remainder of 72.
The next digit of our result is 8. 
Result so far: 7454.91208
Subtracting 728 from 800 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 12:
91 goes into 720 7 times with a remainder of 83.
Put 7 as the next digit of the answer. 
Result so far: 7454.912087
Subtracting 637 from 720 leaves us with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Step 13:
91 goes into 830 9 times with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 7454.9120879
If we subtract 819 from 830, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 14:
If we divide 110 by 91, we get 1 and a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 7454.91208791
Subtract 91 from 110 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 7454.91208791, and the remainder is 1.9e-08.