We look at the division of 75075380 by 66 
The aim is to understand the frequency of 66 in 75075380.

Let's proceed to step 1:
66 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 66

Step 2:
If we divide 75 by 66, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 66 away from 75, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 66

On to step 3:
The number 66 fits into 90 1 times, leaving a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Deduct 66 from 90 and we're left with 24.
Fetch the next digit (7) from the dividend, attach it to 24 and continue: 247 / 66

Going ahead to step 4:
When dividing 247 by 66, we get 3 with a remainder of 49.
Record the quotient 3 as the next digit in the result. 
Result so far: 113.0
Subtract 198 from 247 to get 49.
Grab the next digit (5) from the dividend, add it to 49, then carry on: 495 / 66

Going ahead to step 5:
66 can be fit into 495 7 times, resulting in a remainder of 33.
Record the quotient 7 as the next digit in the result. 
Result so far: 1137.0
If we take 462 away from 495, we end up with 33.
Append the next digit (3) from the dividend to 33 and continue with: 333 / 66

Step 6:
66 goes into 333 5 times with a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 11375.0
Subtract 330 from 333 to get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 66

On to step 7:
The number 66 fits into 38 0 times, leaving a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 113750.0
The remainder is 38 after subtracting 0 from 38.
Bring next digit (0) of the dividend behind the 38 and repeat the process: 380 / 66

On to step 8:
If we divide 380 by 66, we get 5 and a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 1137505.0
Subtract 330 from 380 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
66 can be fit into 500 7 times, resulting in a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 1137505.7
The remainder is 38 after subtracting 462 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
When dividing 380 by 66, we get 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 1137505.75
If we subtract 330 from 380, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
When dividing 500 by 66, we get 7 with a remainder of 38.
The next digit of our result is 7. 
Result so far: 1137505.757
The remainder is 38 after subtracting 462 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 12:
66 goes into 380 5 times with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 1137505.7575
Subtract 330 from 380 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 13:
66 goes into 500 7 times with a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 1137505.75757
The remainder is 38 after subtracting 462 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 14:
66 goes into 380 5 times with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 1137505.757575
Deduct 330 from 380 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 15:
66 can be fit into 500 7 times, resulting in a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 1137505.7575757
If we subtract 462 from 500, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 16:
If we divide 380 by 66, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 1137505.75757575
If we subtract 330 from 380, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 1137505.75757575, and the remainder is 5e-08.