We look at the division of 888877 by 90 
The aim is to understand the frequency of 90 in 888877.

Step 1:
8 divided by 90 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 90

Moving on to step 2:
If we divide 88 by 90, we get 0 and a remainder of 88.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 88, we get 88.
Bring next digit (8) of the dividend behind the 88 and repeat the process: 888 / 90

Let's proceed to step 3:
90 goes into 888 9 times with a remainder of 78.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 810 from 888 and we're left with 78.
Bring next digit (8) of the dividend behind the 78 and repeat the process: 788 / 90

Going ahead to step 4:
90 can be fit into 788 8 times, resulting in a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 98.0
The remainder is 68 after subtracting 720 from 788.
Fetch the next digit (7) from the dividend, attach it to 68 and continue: 687 / 90

Advancing to step 5:
90 can be fit into 687 7 times, resulting in a remainder of 57.
The next digit of our result is 7. 
Result so far: 987.0
The remainder is 57 after subtracting 630 from 687.
Bring next digit (7) of the dividend behind the 57 and repeat the process: 577 / 90

On to step 6:
90 goes into 577 6 times with a remainder of 37.
The number 6 becomes the next digit in our result. 
Result so far: 9876.0
Deduct 540 from 577 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 7:
370 divided by 90 is 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 9876.4
Deduct 360 from 370 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
When dividing 100 by 90, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 9876.41
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
100 divided by 90 is 1 with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 9876.411
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 9876.411 with a balance of 0.001.