We look at the division of 545577 by 66 
The aim is to understand the frequency of 66 in 545577.

Moving on to step 1:
5 divided by 66 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 66

On to step 2:
54 divided by 66 is 0 with a remainder of 54.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Include the next digit (5) from the dividend after 54, then repeat: 545 / 66

Going ahead to step 3:
If we divide 545 by 66, we get 8 and a remainder of 17.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 528 from 545 and we're left with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 66

Going ahead to step 4:
When dividing 175 by 66, we get 2 with a remainder of 43.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
If we subtract 132 from 175, we get 43.
Include the next digit (7) from the dividend after 43, then repeat: 437 / 66

Advancing to step 5:
66 goes into 437 6 times with a remainder of 41.
The number 6 becomes the next digit in our result. 
Result so far: 826.0
Subtract 396 from 437 to get 41.
Bring next digit (7) of the dividend behind the 41 and repeat the process: 417 / 66

Step 6:
The number 66 fits into 417 6 times, leaving a remainder of 21.
The next digit of our result is 6. 
Result so far: 8266.0
Subtracting 396 from 417 leaves us 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:
When dividing 210 by 66, we get 3 with a remainder of 12.
The next digit of our result is 3. 
Result so far: 8266.3
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.

Step 8:
If we divide 120 by 66, we get 1 and a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 8266.31
Subtract 66 from 120 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 9:
540 divided by 66 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 8266.318
If we subtract 528 from 540, we 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 10:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 8266.3181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 11:
540 divided by 66 is 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 8266.31818
Subtract 528 from 540 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.

Moving on to step 12:
120 divided by 66 is 1 with a remainder of 54.
The next digit of our result is 1. 
Result so far: 8266.318181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 13:
540 divided by 66 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 8266.3181818
Subtracting 528 from 540 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 14:
If we divide 120 by 66, we get 1 and a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 8266.31818181
If we take 66 away from 120, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final result is 8266.31818181 with a remainder of 5.4e-08.