Let's divide 986131 by 90
The aim is to understand the frequency of 90 in 986131.

Let's proceed to step 1:
If we divide 9 by 90, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 90

Step 2:
90 goes into 98 1 times with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 90 from 98 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 90

Moving on to step 3:
90 can be fit into 86 0 times, resulting in a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 86, we get 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 90

Advancing to step 4:
861 divided by 90 is 9 with a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 109.0
The remainder is 51 after subtracting 810 from 861.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 90

Moving on to step 5:
When dividing 513 by 90, we get 5 with a remainder of 63.
Record the quotient 5 as the next digit in the result. 
Result so far: 1095.0
If we subtract 450 from 513, we get 63.
Fetch the next digit (1) from the dividend, attach it to 63 and continue: 631 / 90

Moving on to step 6:
When dividing 631 by 90, we get 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 10957.0
Subtract 630 from 631 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
10 divided by 90 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 10957.0
If we take 0 away from 10, 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.

Going ahead to step 8:
The number 90 fits into 100 1 times, leaving a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 10957.01
Deduct 90 from 100 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.

Going ahead to step 9:
90 goes into 100 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 10957.011
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 10957.011 with a remaining 0.001.