859755 ÷ 90 
The aim is to understand the frequency of 90 in 859755.

On to step 1:
The number 90 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 90

Going ahead to step 2:
If we divide 85 by 90, we get 0 and a remainder of 85.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Append the next digit (9) from the dividend to 85 and continue with: 859 / 90

Going ahead to step 3:
90 can be fit into 859 9 times, resulting in a remainder of 49.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 810 away from 859, we end up with 49.
Take the next digit (7) from the dividend and append it to 49, then repeat: 497 / 90

Step 4:
When dividing 497 by 90, we get 5 with a remainder of 47.
Use 5 as the next digit of our solution. 
Result so far: 95.0
Subtracting 450 from 497 leaves us with 47.
Fetch the next digit (5) from the dividend, attach it to 47 and continue: 475 / 90

On to step 5:
475 divided by 90 is 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 955.0
If we take 450 away from 475, we end up with 25.
Append the next digit (5) from the dividend to 25 and continue with: 255 / 90

Let's proceed to step 6:
The number 90 fits into 255 2 times, leaving a remainder of 75.
Use 2 as the next digit of our solution. 
Result so far: 9552.0
Subtract 180 from 255 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 7:
750 divided by 90 is 8 with a remainder of 30.
Put 8 as the next digit of the answer. 
Result so far: 9552.8
Subtracting 720 from 750 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
90 goes into 300 3 times with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 9552.83
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
90 goes into 300 3 times with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 9552.833
Subtract 270 from 300 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 9552.833, with a leftover of 0.003.