We look at the division of 625189 by 66 
The aim is to understand the frequency of 66 in 625189.

On to step 1:
66 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 66

Let's proceed to step 2:
62 divided by 66 is 0 with a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 62 after subtracting 0 from 62.
Bring next digit (5) of the dividend behind the 62 and repeat the process: 625 / 66

Going ahead to step 3:
If we divide 625 by 66, we get 9 and a remainder of 31.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 594 from 625 to get 31.
Fetch the next digit (1) from the dividend, attach it to 31 and continue: 311 / 66

Advancing to step 4:
66 goes into 311 4 times with a remainder of 47.
Put 4 as the next digit of the answer. 
Result so far: 94.0
Subtracting 264 from 311 leaves us with 47.
Take the next digit (8) from the dividend and append it to 47, then repeat: 478 / 66

Step 5:
478 divided by 66 is 7 with a remainder of 16.
Put 7 as the next digit of the answer. 
Result so far: 947.0
If we subtract 462 from 478, we get 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 66

Moving on to step 6:
66 can be fit into 169 2 times, resulting in a remainder of 37.
Put 2 as the next digit of the answer. 
Result so far: 9472.0
Deduct 132 from 169 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 7:
If we divide 370 by 66, we get 5 and a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 9472.5
Subtract 330 from 370 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
The number 66 fits into 400 6 times, leaving a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 9472.56
If we take 396 away from 400, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 9:
The number 66 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 9472.56
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
66 can be fit into 400 6 times, resulting in a remainder of 4.
The next digit of our result is 6. 
Result so far: 9472.5606
Deduct 396 from 400 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
66 can be fit into 40 0 times, resulting in a remainder of 40.
The next digit of our result is 0. 
Result so far: 9472.5606
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 12:
66 can be fit into 400 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 9472.560606
Deduct 396 from 400 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 13:
66 can be fit into 40 0 times, resulting in a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 9472.560606
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 14:
66 goes into 400 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 9472.56060606
If we subtract 396 from 400, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 9472.56060606 with a remaining 4e-09.