687896 ÷ 66 
The aim is to understand the frequency of 66 in 687896.

Step 1:
When dividing 6 by 66, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 66

On to step 2:
If we divide 68 by 66, we get 1 and a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 66 away from 68, we end up with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 66

Moving on to step 3:
If we divide 27 by 66, we get 0 and a remainder of 27.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 27 leaves us with 27.
Grab the next digit (8) from the dividend, add it to 27, then carry on: 278 / 66

Advancing to step 4:
66 can be fit into 278 4 times, resulting in a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
Subtract 264 from 278 to get 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 66

On to step 5:
149 divided by 66 is 2 with a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 1042.0
Deduct 132 from 149 and we're left with 17.
Append the next digit (6) from the dividend to 17 and continue with: 176 / 66

Step 6:
The number 66 fits into 176 2 times, leaving a remainder of 44.
The number 2 becomes the next digit in our result. 
Result so far: 10422.0
Subtract 132 from 176 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 7:
66 can be fit into 440 6 times, resulting in a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 10422.6
Subtracting 396 from 440 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 8:
66 goes into 440 6 times with a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 10422.66
Subtracting 396 from 440 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final result is 10422.66 with a remainder of 0.044.