29935778 ÷ 686 
The aim is to understand the frequency of 686 in 29935778.

Advancing to step 1:
The number 686 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 686

Advancing to step 2:
686 can be fit into 29 0 times, resulting in 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.
Append the next digit (9) from the dividend to 29 and continue with: 299 / 686

Moving on to step 3:
If we divide 299 by 686, we get 0 and a remainder of 299.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 299 and we're left with 299.
Include the next digit (3) from the dividend after 299, then repeat: 2993 / 686

Let's proceed to step 4:
The number 686 fits into 2993 4 times, leaving a remainder of 249.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 2744 from 2993 leaves us with 249.
Append the next digit (5) from the dividend to 249 and continue with: 2495 / 686

Going ahead to step 5:
When dividing 2495 by 686, we get 3 with a remainder of 437.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtracting 2058 from 2495 leaves us with 437.
Append the next digit (7) from the dividend to 437 and continue with: 4377 / 686

Step 6:
686 can be fit into 4377 6 times, resulting in a remainder of 261.
Put 6 as the next digit of the answer. 
Result so far: 436.0
The remainder is 261 after subtracting 4116 from 4377.
Grab the next digit (7) from the dividend, add it to 261, then carry on: 2617 / 686

On to step 7:
The number 686 fits into 2617 3 times, leaving a remainder of 559.
The next digit of our result is 3. 
Result so far: 4363.0
Deduct 2058 from 2617 and we're left with 559.
Append the next digit (8) from the dividend to 559 and continue with: 5598 / 686

On to step 8:
686 can be fit into 5598 8 times, resulting in a remainder of 110.
Use 8 as the next digit of our solution. 
Result so far: 43638.0
If we take 5488 away from 5598, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 9:
If we divide 1100 by 686, we get 1 and a remainder of 414.
Write down 1 as next digit of the result. 
Result so far: 43638.1
The remainder is 414 after subtracting 686 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

On to step 10:
The number 686 fits into 4140 6 times, leaving a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 43638.16
If we subtract 4116 from 4140, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 11:
240 divided by 686 is 0 with a remainder of 240.
Use 0 as the next digit of our solution. 
Result so far: 43638.16
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 12:
686 can be fit into 2400 3 times, resulting in a remainder of 342.
The next digit of our result is 3. 
Result so far: 43638.1603
Subtract 2058 from 2400 to get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

On to step 13:
3420 divided by 686 is 4 with a remainder of 676.
Write down 4 as next digit of the result. 
Result so far: 43638.16034
If we take 2744 away from 3420, we end up with 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Advancing to step 14:
The number 686 fits into 6760 9 times, leaving a remainder of 586.
The next digit of our result is 9. 
Result so far: 43638.160349
Subtracting 6174 from 6760 leaves us with 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Let's proceed to step 15:
5860 divided by 686 is 8 with a remainder of 372.
Put 8 as the next digit of the answer. 
Result so far: 43638.1603498
Deduct 5488 from 5860 and we're left with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Advancing to step 16:
686 goes into 3720 5 times with a remainder of 290.
Record the quotient 5 as the next digit in the result. 
Result so far: 43638.16034985
If we take 3430 away from 3720, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

In conclusion, the division gives 43638.16034985 with a balance of 2.9e-07.