We look at the division of 102548 by 66 
The aim is to understand the frequency of 66 in 102548.

Advancing to step 1:
If we divide 1 by 66, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 66

Let's proceed to step 2:
66 goes into 10 0 times with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 66

Let's proceed to step 3:
66 can be fit into 102 1 times, resulting in a remainder of 36.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 36 after subtracting 66 from 102.
Take the next digit (5) from the dividend and append it to 36, then repeat: 365 / 66

On to step 4:
The number 66 fits into 365 5 times, leaving a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we take 330 away from 365, we end up with 35.
Include the next digit (4) from the dividend after 35, then repeat: 354 / 66

Moving on to step 5:
The number 66 fits into 354 5 times, leaving a remainder of 24.
Put 5 as the next digit of the answer. 
Result so far: 155.0
The remainder is 24 after subtracting 330 from 354.
Grab the next digit (8) from the dividend, add it to 24, then carry on: 248 / 66

On to step 6:
If we divide 248 by 66, we get 3 and a remainder of 50.
Use 3 as the next digit of our solution. 
Result so far: 1553.0
Deduct 198 from 248 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.

Step 7:
When dividing 500 by 66, we get 7 with a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 1553.7
If we take 462 away from 500, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 8:
380 divided by 66 is 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 1553.75
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.

On to step 9:
When dividing 500 by 66, we get 7 with a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 1553.757
Deduct 462 from 500 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 10:
If we divide 380 by 66, we get 5 and a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 1553.7575
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.

Let's proceed to step 11:
66 can be fit into 500 7 times, resulting in a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 1553.75757
If we take 462 away from 500, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 12:
66 can be fit into 380 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 1553.757575
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.

Going ahead to step 13:
If we divide 500 by 66, we get 7 and a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 1553.7575757
Subtracting 462 from 500 leaves us with 38.
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 14:
380 divided by 66 is 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 1553.75757575
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 final result is 1553.75757575 with a remainder of 5e-08.