We divide 88278 by 90
The aim is to understand the frequency of 90 in 88278.

Step 1:
If we divide 8 by 90, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 90

On to step 2:
The number 90 fits into 88 0 times, leaving a remainder of 88.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 88 to get 88.
Fetch the next digit (2) from the dividend, attach it to 88 and continue: 882 / 90

Moving on to step 3:
When dividing 882 by 90, we get 9 with a remainder of 72.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 810 from 882 and we're left with 72.
Take the next digit (7) from the dividend and append it to 72, then repeat: 727 / 90

Step 4:
90 can be fit into 727 8 times, resulting in a remainder of 7.
Use 8 as the next digit of our solution. 
Result so far: 98.0
Deduct 720 from 727 and we're left with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 90

Going ahead to step 5:
90 goes into 78 0 times with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 980.0
If we subtract 0 from 78, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 6:
780 divided by 90 is 8 with a remainder of 60.
Record the quotient 8 as the next digit in the result. 
Result so far: 980.8
The remainder is 60 after subtracting 720 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 7:
When dividing 600 by 90, we get 6 with a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 980.86
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The next digit of our result is 6. 
Result so far: 980.866
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The quotient of the division is 980.866, and the remainder is 0.006.