We divide 650743 by 90
The aim is to understand the frequency of 90 in 650743.

Going ahead to step 1:
6 divided by 90 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 90

Step 2:
If we divide 65 by 90, we get 0 and a remainder of 65.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 65 after subtracting 0 from 65.
Take the next digit (0) from the dividend and append it to 65, then repeat: 650 / 90

Step 3:
When dividing 650 by 90, we get 7 with a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 630 from 650, we get 20.
Bring next digit (7) of the dividend behind the 20 and repeat the process: 207 / 90

Step 4:
When dividing 207 by 90, we get 2 with a remainder of 27.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
If we subtract 180 from 207, we get 27.
Grab the next digit (4) from the dividend, add it to 27, then carry on: 274 / 90

Moving on to step 5:
274 divided by 90 is 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 723.0
If we subtract 270 from 274, we get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 90

Going ahead to step 6:
43 divided by 90 is 0 with a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 7230.0
If we subtract 0 from 43, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 7:
If we divide 430 by 90, we get 4 and a remainder of 70.
The next digit of our result is 4. 
Result so far: 7230.4
If we subtract 360 from 430, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
When dividing 700 by 90, we get 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 7230.47
If we take 630 away from 700, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
The next digit of our result is 7. 
Result so far: 7230.477
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 7230.477, and the remainder is 0.007.