29802109 ÷ 688 
The aim is to understand the frequency of 688 in 29802109.

Going ahead to step 1:
688 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 688

Let's proceed to step 2:
29 divided by 688 is 0 with a remainder of 29.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 29 after subtracting 0 from 29.
Take the next digit (8) from the dividend and append it to 29, then repeat: 298 / 688

Advancing to step 3:
If we divide 298 by 688, we get 0 and a remainder of 298.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 298 and we're left with 298.
Bring next digit (0) of the dividend behind the 298 and repeat the process: 2980 / 688

Advancing to step 4:
The number 688 fits into 2980 4 times, leaving a remainder of 228.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 2752 from 2980 and we're left with 228.
Grab the next digit (2) from the dividend, add it to 228, then carry on: 2282 / 688

Step 5:
688 can be fit into 2282 3 times, resulting in a remainder of 218.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtracting 2064 from 2282 leaves us with 218.
Include the next digit (1) from the dividend after 218, then repeat: 2181 / 688

Let's proceed to step 6:
688 can be fit into 2181 3 times, resulting in a remainder of 117.
Put 3 as the next digit of the answer. 
Result so far: 433.0
Subtract 2064 from 2181 to get 117.
Grab the next digit (0) from the dividend, add it to 117, then carry on: 1170 / 688

Step 7:
1170 divided by 688 is 1 with a remainder of 482.
Put 1 as the next digit of the answer. 
Result so far: 4331.0
If we subtract 688 from 1170, we get 482.
Grab the next digit (9) from the dividend, add it to 482, then carry on: 4829 / 688

On to step 8:
688 can be fit into 4829 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 43317.0
If we take 4816 away from 4829, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 9:
130 divided by 688 is 0 with a remainder of 130.
Record the quotient 0 as the next digit in the result. 
Result so far: 43317.0
Subtract 0 from 130 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Going ahead to step 10:
When dividing 1300 by 688, we get 1 with a remainder of 612.
The number 1 becomes the next digit in our result. 
Result so far: 43317.01
The remainder is 612 after subtracting 688 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Going ahead to step 11:
The number 688 fits into 6120 8 times, leaving a remainder of 616.
Write down 8 as next digit of the result. 
Result so far: 43317.018
The remainder is 616 after subtracting 5504 from 6120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Let's proceed to step 12:
6160 divided by 688 is 8 with a remainder of 656.
Put 8 as the next digit of the answer. 
Result so far: 43317.0188
The remainder is 656 after subtracting 5504 from 6160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

The final outcome is 43317.0188, with a leftover of 0.00656.