Let's divide 998907 by 90
The aim is to understand the frequency of 90 in 998907.

Moving on to step 1:
The number 90 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 90

Let's proceed to step 2:
90 can be fit into 99 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 9 after subtracting 90 from 99.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 90

Moving on to step 3:
98 divided by 90 is 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 90 away from 98, we end up with 8.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 90

On to step 4:
89 divided by 90 is 0 with a remainder of 89.
Use 0 as the next digit of our solution. 
Result so far: 110.0
If we subtract 0 from 89, we get 89.
Fetch the next digit (0) from the dividend, attach it to 89 and continue: 890 / 90

Moving on to step 5:
The number 90 fits into 890 9 times, leaving a remainder of 80.
The number 9 becomes the next digit in our result. 
Result so far: 1109.0
Subtracting 810 from 890 leaves us with 80.
Append the next digit (7) from the dividend to 80 and continue with: 807 / 90

On to step 6:
The number 90 fits into 807 8 times, leaving a remainder of 87.
Put 8 as the next digit of the answer. 
Result so far: 11098.0
The remainder is 87 after subtracting 720 from 807.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 7:
When dividing 870 by 90, we get 9 with a remainder of 60.
The next digit of our result is 9. 
Result so far: 11098.9
Deduct 810 from 870 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:
90 goes into 600 6 times with a remainder of 60.
The next digit of our result is 6. 
Result so far: 11098.96
If we take 540 away from 600, we end up 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.

Advancing to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 11098.966
Subtract 540 from 600 to 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.

In conclusion, the division gives 11098.966 with a balance of 0.006.