We divide 775536 by 90
The aim is to understand the frequency of 90 in 775536.

Let's proceed to step 1:
7 divided by 90 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 90

Advancing to step 2:
77 divided by 90 is 0 with a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Grab the next digit (5) from the dividend, add it to 77, then carry on: 775 / 90

On to step 3:
90 can be fit into 775 8 times, resulting in a remainder of 55.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 720 from 775 to get 55.
Fetch the next digit (5) from the dividend, attach it to 55 and continue: 555 / 90

Let's proceed to step 4:
90 goes into 555 6 times with a remainder of 15.
Record the quotient 6 as the next digit in the result. 
Result so far: 86.0
If we take 540 away from 555, we end up with 15.
Include the next digit (3) from the dividend after 15, then repeat: 153 / 90

Going ahead to step 5:
When dividing 153 by 90, we get 1 with a remainder of 63.
Put 1 as the next digit of the answer. 
Result so far: 861.0
Subtract 90 from 153 to get 63.
Grab the next digit (6) from the dividend, add it to 63, then carry on: 636 / 90

Let's proceed to step 6:
90 can be fit into 636 7 times, resulting in a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 8617.0
The remainder is 6 after subtracting 630 from 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
If we divide 60 by 90, we get 0 and a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 8617.0
The remainder is 60 after subtracting 0 from 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 8:
If we divide 600 by 90, we get 6 and a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 8617.06
Deduct 540 from 600 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 9:
When dividing 600 by 90, we get 6 with a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 8617.066
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.

The final outcome is 8617.066, with a leftover of 0.006.