915756 divided by 90 
The aim is to understand the frequency of 90 in 915756.

Let's proceed to step 1:
The number 90 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 90

Step 2:
91 divided by 90 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 90 from 91 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 90

On to step 3:
When dividing 15 by 90, we get 0 with a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 15 and we're left with 15.
Append the next digit (7) from the dividend to 15 and continue with: 157 / 90

Moving on to step 4:
90 goes into 157 1 times with a remainder of 67.
Use 1 as the next digit of our solution. 
Result so far: 101.0
Deduct 90 from 157 and we're left with 67.
Append the next digit (5) from the dividend to 67 and continue with: 675 / 90

Going ahead to step 5:
675 divided by 90 is 7 with a remainder of 45.
Put 7 as the next digit of the answer. 
Result so far: 1017.0
The remainder is 45 after subtracting 630 from 675.
Include the next digit (6) from the dividend after 45, then repeat: 456 / 90

On to step 6:
90 goes into 456 5 times with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 10175.0
Deduct 450 from 456 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
The number 90 fits into 60 0 times, leaving a remainder of 60.
The next digit of our result is 0. 
Result so far: 10175.0
Deduct 0 from 60 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.

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: 10175.06
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.

On to step 9:
When dividing 600 by 90, we get 6 with a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 10175.066
Subtracting 540 from 600 leaves us 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 10175.066, with a leftover of 0.006.