744251 divided by 90 
The aim is to understand the frequency of 90 in 744251.

Going ahead 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
Subtract 0 from 7 to get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 90

Going ahead to step 2:
90 can be fit into 74 0 times, resulting in a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 74 and we're left with 74.
Include the next digit (4) from the dividend after 74, then repeat: 744 / 90

Let's proceed to step 3:
When dividing 744 by 90, we get 8 with a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 720 from 744 leaves us with 24.
Include the next digit (2) from the dividend after 24, then repeat: 242 / 90

Moving on to step 4:
90 goes into 242 2 times with a remainder of 62.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
If we subtract 180 from 242, we get 62.
Bring next digit (5) of the dividend behind the 62 and repeat the process: 625 / 90

Going ahead to step 5:
90 can be fit into 625 6 times, resulting in a remainder of 85.
Record the quotient 6 as the next digit in the result. 
Result so far: 826.0
Subtracting 540 from 625 leaves us with 85.
Bring next digit (1) of the dividend behind the 85 and repeat the process: 851 / 90

Advancing to step 6:
When dividing 851 by 90, we get 9 with a remainder of 41.
The number 9 becomes the next digit in our result. 
Result so far: 8269.0
The remainder is 41 after subtracting 810 from 851.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 7:
When dividing 410 by 90, we get 4 with a remainder of 50.
Use 4 as the next digit of our solution. 
Result so far: 8269.4
If we take 360 away from 410, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
If we divide 500 by 90, we get 5 and a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 8269.45
Subtracting 450 from 500 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
500 divided by 90 is 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 8269.455
Subtracting 450 from 500 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 8269.455 with a remaining 0.005.