Let's divide 64688 by 66
The aim is to understand the frequency of 66 in 64688.

Step 1:
6 divided by 66 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 66

Moving on to step 2:
If we divide 64 by 66, we get 0 and a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Bring next digit (6) of the dividend behind the 64 and repeat the process: 646 / 66

Going ahead to step 3:
66 can be fit into 646 9 times, resulting in a remainder of 52.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 594 from 646 to get 52.
Bring next digit (8) of the dividend behind the 52 and repeat the process: 528 / 66

Going ahead to step 4:
If we divide 528 by 66, we get 8 and a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 98.0
If we subtract 528 from 528, we get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 66

Moving on to step 5:
8 divided by 66 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 980.0
Subtract 0 from 8 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 6:
66 goes into 80 1 times with a remainder of 14.
The next digit of our result is 1. 
Result so far: 980.1
The remainder is 14 after subtracting 66 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
66 can be fit into 140 2 times, resulting in a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 980.12
Subtract 132 from 140 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
If we divide 80 by 66, we get 1 and a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 980.121
Deduct 66 from 80 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
The number 66 fits into 140 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 980.1212
If we subtract 132 from 140, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
66 goes into 80 1 times with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 980.12121
Deduct 66 from 80 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 11:
When dividing 140 by 66, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 980.121212
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
The number 66 fits into 80 1 times, leaving a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 980.1212121
Deduct 66 from 80 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 13:
If we divide 140 by 66, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 980.12121212
Subtract 132 from 140 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 980.12121212 and a remainder of 8e-09.