We're dividing 13988898 by 686 
The aim is to understand the frequency of 686 in 13988898.

Moving on to step 1:
686 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 686

Going ahead to step 2:
686 goes into 13 0 times with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 686

Advancing to step 3:
The number 686 fits into 139 0 times, leaving a remainder of 139.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 139 and we're left with 139.
Append the next digit (8) from the dividend to 139 and continue with: 1398 / 686

Moving on to step 4:
The number 686 fits into 1398 2 times, leaving a remainder of 26.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 1372 from 1398 to get 26.
Bring next digit (8) of the dividend behind the 26 and repeat the process: 268 / 686

Advancing to step 5:
686 can be fit into 268 0 times, resulting in a remainder of 268.
The next digit of our result is 0. 
Result so far: 20.0
If we subtract 0 from 268, we get 268.
Bring next digit (8) of the dividend behind the 268 and repeat the process: 2688 / 686

Advancing to step 6:
If we divide 2688 by 686, we get 3 and a remainder of 630.
Record the quotient 3 as the next digit in the result. 
Result so far: 203.0
If we subtract 2058 from 2688, we get 630.
Grab the next digit (9) from the dividend, add it to 630, then carry on: 6309 / 686

Advancing to step 7:
When dividing 6309 by 686, we get 9 with a remainder of 135.
Write down 9 as next digit of the result. 
Result so far: 2039.0
Subtracting 6174 from 6309 leaves us with 135.
Fetch the next digit (8) from the dividend, attach it to 135 and continue: 1358 / 686

Advancing to step 8:
When dividing 1358 by 686, we get 1 with a remainder of 672.
Record the quotient 1 as the next digit in the result. 
Result so far: 20391.0
The remainder is 672 after subtracting 686 from 1358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Going ahead to step 9:
686 can be fit into 6720 9 times, resulting in a remainder of 546.
The next digit of our result is 9. 
Result so far: 20391.9
Subtract 6174 from 6720 to get 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

On to step 10:
686 goes into 5460 7 times with a remainder of 658.
Use 7 as the next digit of our solution. 
Result so far: 20391.97
If we subtract 4802 from 5460, we get 658.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

Moving on to step 11:
6580 divided by 686 is 9 with a remainder of 406.
The number 9 becomes the next digit in our result. 
Result so far: 20391.979
If we subtract 6174 from 6580, we get 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Step 12:
The number 686 fits into 4060 5 times, leaving a remainder of 630.
Record the quotient 5 as the next digit in the result. 
Result so far: 20391.9795
Subtract 3430 from 4060 to get 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Step 13:
When dividing 6300 by 686, we get 9 with a remainder of 126.
Write down 9 as next digit of the result. 
Result so far: 20391.97959
If we take 6174 away from 6300, we end up with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 14:
686 goes into 1260 1 times with a remainder of 574.
Record the quotient 1 as the next digit in the result. 
Result so far: 20391.979591
If we subtract 686 from 1260, we get 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

Advancing to step 15:
686 can be fit into 5740 8 times, resulting in a remainder of 252.
The next digit of our result is 8. 
Result so far: 20391.9795918
Subtract 5488 from 5740 to get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 16:
2520 divided by 686 is 3 with a remainder of 462.
The next digit of our result is 3. 
Result so far: 20391.97959183
The remainder is 462 after subtracting 2058 from 2520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

The final outcome is 20391.97959183, with a leftover of 4.62e-07.