Let's divide 19735871 by 686
The aim is to understand the frequency of 686 in 19735871.

Moving on to step 1:
If we divide 1 by 686, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 686

On to step 2:
686 goes into 19 0 times with a remainder of 19.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 19, we end up with 19.
Take the next digit (7) from the dividend and append it to 19, then repeat: 197 / 686

Going ahead to step 3:
When dividing 197 by 686, we get 0 with a remainder of 197.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 197 after subtracting 0 from 197.
Take the next digit (3) from the dividend and append it to 197, then repeat: 1973 / 686

Step 4:
686 can be fit into 1973 2 times, resulting in a remainder of 601.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1372 from 1973, we get 601.
Grab the next digit (5) from the dividend, add it to 601, then carry on: 6015 / 686

Advancing to step 5:
The number 686 fits into 6015 8 times, leaving a remainder of 527.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
Subtracting 5488 from 6015 leaves us with 527.
Append the next digit (8) from the dividend to 527 and continue with: 5278 / 686

Advancing to step 6:
686 goes into 5278 7 times with a remainder of 476.
Use 7 as the next digit of our solution. 
Result so far: 287.0
The remainder is 476 after subtracting 4802 from 5278.
Include the next digit (7) from the dividend after 476, then repeat: 4767 / 686

Moving on to step 7:
When dividing 4767 by 686, we get 6 with a remainder of 651.
The number 6 becomes the next digit in our result. 
Result so far: 2876.0
Subtract 4116 from 4767 to get 651.
Include the next digit (1) from the dividend after 651, then repeat: 6511 / 686

Advancing to step 8:
686 goes into 6511 9 times with a remainder of 337.
The next digit of our result is 9. 
Result so far: 28769.0
If we subtract 6174 from 6511, we get 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Advancing to step 9:
686 can be fit into 3370 4 times, resulting in a remainder of 626.
The next digit of our result is 4. 
Result so far: 28769.4
Deduct 2744 from 3370 and we're left with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Moving on to step 10:
If we divide 6260 by 686, we get 9 and a remainder of 86.
The number 9 becomes the next digit in our result. 
Result so far: 28769.49
If we take 6174 away from 6260, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 11:
If we divide 860 by 686, we get 1 and a remainder of 174.
Put 1 as the next digit of the answer. 
Result so far: 28769.491
Subtract 686 from 860 to get 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Going ahead to step 12:
1740 divided by 686 is 2 with a remainder of 368.
The next digit of our result is 2. 
Result so far: 28769.4912
Subtract 1372 from 1740 to get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 13:
686 goes into 3680 5 times with a remainder of 250.
The number 5 becomes the next digit in our result. 
Result so far: 28769.49125
Subtracting 3430 from 3680 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Going ahead to step 14:
2500 divided by 686 is 3 with a remainder of 442.
Write down 3 as next digit of the result. 
Result so far: 28769.491253
Deduct 2058 from 2500 and we're left with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Moving on to step 15:
4420 divided by 686 is 6 with a remainder of 304.
Use 6 as the next digit of our solution. 
Result so far: 28769.4912536
Deduct 4116 from 4420 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Advancing to step 16:
686 goes into 3040 4 times with a remainder of 296.
The number 4 becomes the next digit in our result. 
Result so far: 28769.49125364
Deduct 2744 from 3040 and we're left with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

The final outcome is 28769.49125364, with a leftover of 2.96e-07.