887432 ÷ 91 
The aim is to understand the frequency of 91 in 887432.

Step 1:
When dividing 8 by 91, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 91

Moving on to step 2:
91 goes into 88 0 times with a remainder of 88.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 88 leaves us with 88.
Take the next digit (7) from the dividend and append it to 88, then repeat: 887 / 91

Going ahead to step 3:
91 goes into 887 9 times with a remainder of 68.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 819 from 887, we get 68.
Include the next digit (4) from the dividend after 68, then repeat: 684 / 91

Advancing to step 4:
91 goes into 684 7 times with a remainder of 47.
Write down 7 as next digit of the result. 
Result so far: 97.0
If we take 637 away from 684, we end up with 47.
Fetch the next digit (3) from the dividend, attach it to 47 and continue: 473 / 91

Let's proceed to step 5:
473 divided by 91 is 5 with a remainder of 18.
Record the quotient 5 as the next digit in the result. 
Result so far: 975.0
Deduct 455 from 473 and we're left with 18.
Fetch the next digit (2) from the dividend, attach it to 18 and continue: 182 / 91

Let's proceed to step 6:
182 divided by 91 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 9752.0
If we subtract 182 from 182, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 7:
91 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 9752.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
91 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 9752.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 9752.0 and a remainder of 0.0.