691655 ÷ 66 
The aim is to understand the frequency of 66 in 691655.

Advancing to step 1:
66 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 66

Let's proceed to step 2:
69 divided by 66 is 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 66 from 69, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 66

Let's proceed to step 3:
When dividing 31 by 66, we get 0 with a remainder of 31.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 31, we get 31.
Take the next digit (6) from the dividend and append it to 31, then repeat: 316 / 66

Advancing to step 4:
If we divide 316 by 66, we get 4 and a remainder of 52.
The next digit of our result is 4. 
Result so far: 104.0
The remainder is 52 after subtracting 264 from 316.
Append the next digit (5) from the dividend to 52 and continue with: 525 / 66

Step 5:
66 can be fit into 525 7 times, resulting in a remainder of 63.
Use 7 as the next digit of our solution. 
Result so far: 1047.0
If we take 462 away from 525, we end up with 63.
Append the next digit (5) from the dividend to 63 and continue with: 635 / 66

Step 6:
635 divided by 66 is 9 with a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 10479.0
If we take 594 away from 635, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
The number 66 fits into 410 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 10479.6
Deduct 396 from 410 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.

Moving on to step 8:
66 goes into 140 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 10479.62
The remainder is 8 after subtracting 132 from 140.
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 9:
80 divided by 66 is 1 with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 10479.621
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.

On to step 10:
140 divided by 66 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 10479.6212
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.

Moving on to step 11:
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: 10479.62121
If we subtract 66 from 80, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 12:
The number 66 fits into 140 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 10479.621212
Deduct 132 from 140 and we're left 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.

Step 13:
The number 66 fits into 80 1 times, leaving a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 10479.6212121
If we take 66 away from 80, we end up 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.

Advancing to step 14:
140 divided by 66 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 10479.62121212
If we take 132 away from 140, we end up 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.

In conclusion, the division gives 10479.62121212 with a balance of 8e-09.