We're dividing 529156 by 90 
The aim is to understand the frequency of 90 in 529156.

Moving on to step 1:
When dividing 5 by 90, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 90

On to step 2:
The number 90 fits into 52 0 times, leaving a remainder of 52.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Take the next digit (9) from the dividend and append it to 52, then repeat: 529 / 90

Moving on to step 3:
90 can be fit into 529 5 times, resulting in a remainder of 79.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 450 from 529 and we're left with 79.
Append the next digit (1) from the dividend to 79 and continue with: 791 / 90

Moving on to step 4:
90 can be fit into 791 8 times, resulting in a remainder of 71.
Record the quotient 8 as the next digit in the result. 
Result so far: 58.0
Deduct 720 from 791 and we're left with 71.
Bring next digit (5) of the dividend behind the 71 and repeat the process: 715 / 90

Step 5:
715 divided by 90 is 7 with a remainder of 85.
Use 7 as the next digit of our solution. 
Result so far: 587.0
Subtracting 630 from 715 leaves us with 85.
Append the next digit (6) from the dividend to 85 and continue with: 856 / 90

Moving on to step 6:
If we divide 856 by 90, we get 9 and a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 5879.0
Subtract 810 from 856 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 7:
460 divided by 90 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 5879.5
If we subtract 450 from 460, 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.

Let's proceed to step 8:
90 goes into 100 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 5879.51
Subtract 90 from 100 to 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.

Moving on to step 9:
The number 90 fits into 100 1 times, leaving a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 5879.511
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.

The final outcome is 5879.511, with a leftover of 0.001.