We look at the division of 538251 by 33 
The aim is to understand the frequency of 33 in 538251.

On to step 1:
33 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 33

Advancing to step 2:
The number 33 fits into 53 1 times, leaving a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 33 from 53 and we're left with 20.
Grab the next digit (8) from the dividend, add it to 20, then carry on: 208 / 33

Advancing to step 3:
208 divided by 33 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
The remainder is 10 after subtracting 198 from 208.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 33

Step 4:
33 can be fit into 102 3 times, resulting in a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 163.0
The remainder is 3 after subtracting 99 from 102.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 33

Let's proceed to step 5:
The number 33 fits into 35 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1631.0
If we take 33 away from 35, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 33

Let's proceed to step 6:
When dividing 21 by 33, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 16310.0
Deduct 0 from 21 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 7:
33 can be fit into 210 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 16310.6
The remainder is 12 after subtracting 198 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
120 divided by 33 is 3 with a remainder of 21.
Put 3 as the next digit of the answer. 
Result so far: 16310.63
Subtract 99 from 120 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
The number 33 fits into 210 6 times, leaving a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 16310.636
If we take 198 away from 210, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 10:
120 divided by 33 is 3 with a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 16310.6363
If we take 99 away from 120, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 11:
When dividing 210 by 33, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 16310.63636
Subtracting 198 from 210 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 12:
33 can be fit into 120 3 times, resulting in a remainder of 21.
Use 3 as the next digit of our solution. 
Result so far: 16310.636363
If we subtract 99 from 120, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 13:
When dividing 210 by 33, we get 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 16310.6363636
Subtract 198 from 210 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 14:
33 can be fit into 120 3 times, resulting in a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 16310.63636363
If we subtract 99 from 120, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The final result is 16310.63636363 with a remainder of 2.1e-08.