We look at the division of 538912 by 33 
The aim is to understand the frequency of 33 in 538912.

On to step 1:
5 divided by 33 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 33

Let's proceed to step 2:
When dividing 53 by 33, we get 1 with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 33 from 53 leaves us with 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 33

Moving on to step 3:
33 goes into 208 6 times with a remainder of 10.
The next digit of our result is 6. 
Result so far: 16.0
If we take 198 away from 208, we end up with 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 33

On to step 4:
If we divide 109 by 33, we get 3 and a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 163.0
Subtract 99 from 109 to get 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 33

On to step 5:
33 goes into 101 3 times with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 1633.0
Subtract 99 from 101 to get 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 33

Step 6:
33 can be fit into 22 0 times, resulting in a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 16330.0
Subtract 0 from 22 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 7:
33 can be fit into 220 6 times, resulting in a remainder of 22.
The next digit of our result is 6. 
Result so far: 16330.6
If we take 198 away from 220, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 8:
The number 33 fits into 220 6 times, leaving a remainder of 22.
Record the quotient 6 as the next digit in the result. 
Result so far: 16330.66
If we subtract 198 from 220, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 16330.66 with a remainder of 0.022.