We're dividing 66210 by 75 
The aim is to understand the frequency of 75 in 66210.

Advancing to step 1:
When dividing 6 by 75, we get 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.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 75

On to step 2:
75 can be fit into 66 0 times, resulting in a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Bring next digit (2) of the dividend behind the 66 and repeat the process: 662 / 75

On to step 3:
75 can be fit into 662 8 times, resulting in a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 600 away from 662, we end up with 62.
Append the next digit (1) from the dividend to 62 and continue with: 621 / 75

Step 4:
75 can be fit into 621 8 times, resulting in a remainder of 21.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
Deduct 600 from 621 and we're left with 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 75

Advancing to step 5:
75 goes into 210 2 times with a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 882.0
Subtracting 150 from 210 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 6:
600 divided by 75 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 882.8
Subtract 600 from 600 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
When dividing 0 by 75, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 882.8
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
The number 75 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 882.8
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 882.8 with a remainder of 0.0.