954159 ÷ 90 
The aim is to understand the frequency of 90 in 954159.

Advancing to step 1:
If we divide 9 by 90, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 90

Step 2:
If we divide 95 by 90, we get 1 and a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 90 from 95 to get 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 90

Going ahead to step 3:
When dividing 54 by 90, we get 0 with a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 54 after subtracting 0 from 54.
Fetch the next digit (1) from the dividend, attach it to 54 and continue: 541 / 90

Let's proceed to step 4:
When dividing 541 by 90, we get 6 with a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 106.0
The remainder is 1 after subtracting 540 from 541.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 90

Moving on to step 5:
If we divide 15 by 90, we get 0 and a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 1060.0
Deduct 0 from 15 and we're left with 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 90

Moving on to step 6:
90 goes into 159 1 times with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 10601.0
The remainder is 69 after subtracting 90 from 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Let's proceed to step 7:
When dividing 690 by 90, we get 7 with a remainder of 60.
Write down 7 as next digit of the result. 
Result so far: 10601.7
Subtracting 630 from 690 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.

Step 8:
90 can be fit into 600 6 times, resulting in a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 10601.76
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.

Step 9:
90 goes into 600 6 times with a remainder of 60.
The next digit of our result is 6. 
Result so far: 10601.766
Subtract 540 from 600 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.

The final outcome is 10601.766, with a leftover of 0.006.