715704 ÷ 91 
The aim is to understand the frequency of 91 in 715704.

Let's proceed to step 1:
91 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 91

On to step 2:
The number 91 fits into 71 0 times, leaving a remainder of 71.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 71 to get 71.
Append the next digit (5) from the dividend to 71 and continue with: 715 / 91

Moving on to step 3:
715 divided by 91 is 7 with a remainder of 78.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 637 from 715, we get 78.
Take the next digit (7) from the dividend and append it to 78, then repeat: 787 / 91

On to step 4:
When dividing 787 by 91, we get 8 with a remainder of 59.
Put 8 as the next digit of the answer. 
Result so far: 78.0
If we subtract 728 from 787, we get 59.
Append the next digit (0) from the dividend to 59 and continue with: 590 / 91

Moving on to step 5:
91 can be fit into 590 6 times, resulting in a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 786.0
Subtract 546 from 590 to get 44.
Fetch the next digit (4) from the dividend, attach it to 44 and continue: 444 / 91

Let's proceed to step 6:
If we divide 444 by 91, we get 4 and a remainder of 80.
The next digit of our result is 4. 
Result so far: 7864.0
If we take 364 away from 444, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 7:
800 divided by 91 is 8 with a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 7864.8
If we subtract 728 from 800, we get 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 8:
When dividing 720 by 91, we get 7 with a remainder of 83.
Record the quotient 7 as the next digit in the result. 
Result so far: 7864.87
The remainder is 83 after subtracting 637 from 720.
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 9:
830 divided by 91 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 7864.879
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.

On to step 10:
110 divided by 91 is 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 7864.8791
If we take 91 away from 110, we end up 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.

On to step 11:
91 goes into 190 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 7864.87912
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 12:
91 goes into 80 0 times with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 7864.87912
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 13:
800 divided by 91 is 8 with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 7864.8791208
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.

Moving on to step 14:
The number 91 fits into 720 7 times, leaving a remainder of 83.
Put 7 as the next digit of the answer. 
Result so far: 7864.87912087
If we subtract 637 from 720, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

The final outcome is 7864.87912087, with a leftover of 8.3e-08.