652141 divided by 90 
The aim is to understand the frequency of 90 in 652141.

Moving on to step 1:
6 divided by 90 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 90

On to step 2:
90 goes into 65 0 times with a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 65 leaves us with 65.
Take the next digit (2) from the dividend and append it to 65, then repeat: 652 / 90

Let's proceed to step 3:
652 divided by 90 is 7 with a remainder of 22.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 630 from 652 and we're left with 22.
Append the next digit (1) from the dividend to 22 and continue with: 221 / 90

Moving on to step 4:
If we divide 221 by 90, we get 2 and a remainder of 41.
Use 2 as the next digit of our solution. 
Result so far: 72.0
Subtract 180 from 221 to get 41.
Include the next digit (4) from the dividend after 41, then repeat: 414 / 90

Let's proceed to step 5:
If we divide 414 by 90, we get 4 and a remainder of 54.
The number 4 becomes the next digit in our result. 
Result so far: 724.0
Subtract 360 from 414 to get 54.
Include the next digit (1) from the dividend after 54, then repeat: 541 / 90

Moving on to step 6:
When dividing 541 by 90, we get 6 with a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 7246.0
Subtract 540 from 541 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
The number 90 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 7246.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
90 can be fit into 100 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 7246.01
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
If we divide 100 by 90, we get 1 and a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 7246.011
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 7246.011, and the remainder is 0.001.