425717 ÷ 91 
The aim is to understand the frequency of 91 in 425717.

Moving on to step 1:
91 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 91

Going ahead to step 2:
The number 91 fits into 42 0 times, leaving a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Fetch the next digit (5) from the dividend, attach it to 42 and continue: 425 / 91

Advancing to step 3:
If we divide 425 by 91, we get 4 and a remainder of 61.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 364 from 425, we get 61.
Append the next digit (7) from the dividend to 61 and continue with: 617 / 91

Let's proceed to step 4:
The number 91 fits into 617 6 times, leaving a remainder of 71.
Use 6 as the next digit of our solution. 
Result so far: 46.0
Subtract 546 from 617 to get 71.
Append the next digit (1) from the dividend to 71 and continue with: 711 / 91

Step 5:
711 divided by 91 is 7 with a remainder of 74.
The number 7 becomes the next digit in our result. 
Result so far: 467.0
If we take 637 away from 711, we end up with 74.
Grab the next digit (7) from the dividend, add it to 74, then carry on: 747 / 91

On to step 6:
747 divided by 91 is 8 with a remainder of 19.
Use 8 as the next digit of our solution. 
Result so far: 4678.0
If we subtract 728 from 747, we 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.

Going ahead to step 7:
The number 91 fits into 190 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 4678.2
If we take 182 away from 190, we end up 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.

Let's proceed to step 8:
91 goes into 80 0 times with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 4678.2
If we subtract 0 from 80, we 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.

Moving on to step 9:
91 can be fit into 800 8 times, resulting in a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 4678.208
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.

Step 10:
91 goes into 720 7 times with a remainder of 83.
Write down 7 as next digit of the result. 
Result so far: 4678.2087
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.

Advancing to step 11:
If we divide 830 by 91, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 4678.20879
If we take 819 away from 830, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 12:
The number 91 fits into 110 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 4678.208791
Subtracting 91 from 110 leaves us 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.

Advancing to step 13:
The number 91 fits into 190 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 4678.2087912
The remainder is 8 after subtracting 182 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 14:
80 divided by 91 is 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 4678.2087912
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

After the division, we end up with 4678.2087912 and a remainder of 8e-08.