We're dividing 981650 by 90 
The aim is to understand the frequency of 90 in 981650.

Step 1:
The number 90 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 90

Going ahead to step 2:
When dividing 98 by 90, we get 1 with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 90 away from 98, we end up with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 90

Moving on to step 3:
When dividing 81 by 90, we get 0 with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 81, we end up with 81.
Bring next digit (6) of the dividend behind the 81 and repeat the process: 816 / 90

Advancing to step 4:
When dividing 816 by 90, we get 9 with a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 109.0
If we take 810 away from 816, we end up with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 90

On to step 5:
90 goes into 65 0 times with a remainder of 65.
The next digit of our result is 0. 
Result so far: 1090.0
If we take 0 away from 65, we end up with 65.
Append the next digit (0) from the dividend to 65 and continue with: 650 / 90

On to step 6:
90 can be fit into 650 7 times, resulting in a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 10907.0
Subtracting 630 from 650 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 7:
When dividing 200 by 90, we get 2 with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 10907.2
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
200 divided by 90 is 2 with a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 10907.22
The remainder is 20 after subtracting 180 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 10907.22 with a balance of 0.02.