669652 ÷ 66 
The aim is to understand the frequency of 66 in 669652.

Step 1:
If we divide 6 by 66, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 66

Going ahead to step 2:
66 goes into 66 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 66 from 66 to get 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 66

Going ahead to step 3:
9 divided by 66 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 66

On to step 4:
The number 66 fits into 96 1 times, leaving a remainder of 30.
The next digit of our result is 1. 
Result so far: 101.0
If we take 66 away from 96, we end up with 30.
Fetch the next digit (5) from the dividend, attach it to 30 and continue: 305 / 66

On to step 5:
66 goes into 305 4 times with a remainder of 41.
Write down 4 as next digit of the result. 
Result so far: 1014.0
Deduct 264 from 305 and we're left with 41.
Grab the next digit (2) from the dividend, add it to 41, then carry on: 412 / 66

Advancing to step 6:
66 goes into 412 6 times with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 10146.0
If we subtract 396 from 412, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 7:
If we divide 160 by 66, we get 2 and a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 10146.2
Subtract 132 from 160 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 8:
If we divide 280 by 66, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 10146.24
If we take 264 away from 280, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 9:
The number 66 fits into 160 2 times, leaving a remainder of 28.
The next digit of our result is 2. 
Result so far: 10146.242
Deduct 132 from 160 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 10:
If we divide 280 by 66, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 10146.2424
If we take 264 away from 280, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 11:
160 divided by 66 is 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 10146.24242
Deduct 132 from 160 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 12:
If we divide 280 by 66, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 10146.242424
Subtract 264 from 280 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
The number 66 fits into 160 2 times, leaving a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 10146.2424242
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 14:
If we divide 280 by 66, we get 4 and a remainder of 16.
The next digit of our result is 4. 
Result so far: 10146.24242424
If we take 264 away from 280, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 10146.24242424, with a leftover of 1.6e-08.