We look at the division of 669680 by 88 
The aim is to understand the frequency of 88 in 669680.

Moving on to step 1:
6 divided by 88 is 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.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 88

Let's proceed to step 2:
88 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 88

Step 3:
669 divided by 88 is 7 with a remainder of 53.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 616 from 669, we get 53.
Append the next digit (6) from the dividend to 53 and continue with: 536 / 88

On to step 4:
88 goes into 536 6 times with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 76.0
Subtracting 528 from 536 leaves us with 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 88

Step 5:
88 divided by 88 is 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 761.0
Subtracting 88 from 88 leaves us with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 88

On to step 6:
88 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 7610.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
88 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 7610.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
When dividing 0 by 88, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 7610.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 7610.0, with a leftover of 0.0.