We're dividing 729427 by 90 
The aim is to understand the frequency of 90 in 729427.

Let's proceed to step 1:
When dividing 7 by 90, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 90

On to step 2:
90 goes into 72 0 times with a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 72, we get 72.
Fetch the next digit (9) from the dividend, attach it to 72 and continue: 729 / 90

On to step 3:
90 goes into 729 8 times with a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 720 away from 729, we end up with 9.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 90

On to step 4:
90 goes into 94 1 times with a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
If we subtract 90 from 94, we get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 90

Moving on to step 5:
90 goes into 42 0 times with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 810.0
Deduct 0 from 42 and we're left with 42.
Bring next digit (7) of the dividend behind the 42 and repeat the process: 427 / 90

Advancing to step 6:
90 can be fit into 427 4 times, resulting in a remainder of 67.
Record the quotient 4 as the next digit in the result. 
Result so far: 8104.0
Subtract 360 from 427 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 7:
The number 90 fits into 670 7 times, leaving a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 8104.7
Deduct 630 from 670 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
The number 90 fits into 400 4 times, leaving a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 8104.74
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
The number 90 fits into 400 4 times, leaving a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 8104.744
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The quotient of the division is 8104.744, and the remainder is 0.004.