We're dividing 75131 by 66 
The aim is to understand the frequency of 66 in 75131.

Moving on to step 1:
7 divided by 66 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 66

Going ahead to step 2:
When dividing 75 by 66, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 66 from 75 to get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 66

Advancing to step 3:
66 goes into 91 1 times with a remainder of 25.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 66 from 91 and we're left with 25.
Bring next digit (3) of the dividend behind the 25 and repeat the process: 253 / 66

Let's proceed to step 4:
If we divide 253 by 66, we get 3 and a remainder of 55.
Record the quotient 3 as the next digit in the result. 
Result so far: 113.0
Subtracting 198 from 253 leaves us with 55.
Grab the next digit (1) from the dividend, add it to 55, then carry on: 551 / 66

Going ahead to step 5:
66 can be fit into 551 8 times, resulting in a remainder of 23.
Put 8 as the next digit of the answer. 
Result so far: 1138.0
The remainder is 23 after subtracting 528 from 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 6:
66 goes into 230 3 times with a remainder of 32.
Write down 3 as next digit of the result. 
Result so far: 1138.3
Deduct 198 from 230 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 7:
If we divide 320 by 66, we get 4 and a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 1138.34
Subtracting 264 from 320 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 8:
When dividing 560 by 66, we get 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 1138.348
Subtracting 528 from 560 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 9:
320 divided by 66 is 4 with a remainder of 56.
The next digit of our result is 4. 
Result so far: 1138.3484
Deduct 264 from 320 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 10:
When dividing 560 by 66, we get 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 1138.34848
Subtracting 528 from 560 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 11:
If we divide 320 by 66, we get 4 and a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 1138.348484
The remainder is 56 after subtracting 264 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 12:
66 can be fit into 560 8 times, resulting in a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 1138.3484848
Subtracting 528 from 560 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 13:
320 divided by 66 is 4 with a remainder of 56.
The next digit of our result is 4. 
Result so far: 1138.34848484
Subtract 264 from 320 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final outcome is 1138.34848484, with a leftover of 5.6e-08.