We're dividing 169737 by 90 
The aim is to understand the frequency of 90 in 169737.

Moving on to step 1:
1 divided by 90 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 90

On to step 2:
90 goes into 16 0 times with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Append the next digit (9) from the dividend to 16 and continue with: 169 / 90

Step 3:
90 goes into 169 1 times with a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 79 after subtracting 90 from 169.
Fetch the next digit (7) from the dividend, attach it to 79 and continue: 797 / 90

Step 4:
90 goes into 797 8 times with a remainder of 77.
The next digit of our result is 8. 
Result so far: 18.0
If we subtract 720 from 797, we get 77.
Fetch the next digit (3) from the dividend, attach it to 77 and continue: 773 / 90

Going ahead to step 5:
When dividing 773 by 90, we get 8 with a remainder of 53.
The next digit of our result is 8. 
Result so far: 188.0
Subtracting 720 from 773 leaves us with 53.
Bring next digit (7) of the dividend behind the 53 and repeat the process: 537 / 90

Moving on to step 6:
537 divided by 90 is 5 with a remainder of 87.
Use 5 as the next digit of our solution. 
Result so far: 1885.0
Subtract 450 from 537 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 7:
If we divide 870 by 90, we get 9 and a remainder of 60.
Record the quotient 9 as the next digit in the result. 
Result so far: 1885.9
Subtract 810 from 870 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.

Advancing to step 8:
90 goes into 600 6 times with a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 1885.96
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.

Let's proceed to step 9:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 1885.966
The remainder is 60 after subtracting 540 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final result is 1885.966 with a remainder of 0.006.