We're dividing 72710371 by 686 
The aim is to understand the frequency of 686 in 72710371.

Moving on to step 1:
When dividing 7 by 686, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 686

Going ahead to step 2:
686 goes into 72 0 times with a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Append the next digit (7) from the dividend to 72 and continue with: 727 / 686

Advancing to step 3:
If we divide 727 by 686, we get 1 and a remainder of 41.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 686 from 727 to get 41.
Fetch the next digit (1) from the dividend, attach it to 41 and continue: 411 / 686

Going ahead to step 4:
411 divided by 686 is 0 with a remainder of 411.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Deduct 0 from 411 and we're left with 411.
Fetch the next digit (0) from the dividend, attach it to 411 and continue: 4110 / 686

Step 5:
686 can be fit into 4110 5 times, resulting in a remainder of 680.
The next digit of our result is 5. 
Result so far: 105.0
If we subtract 3430 from 4110, we get 680.
Bring next digit (3) of the dividend behind the 680 and repeat the process: 6803 / 686

On to step 6:
6803 divided by 686 is 9 with a remainder of 629.
The next digit of our result is 9. 
Result so far: 1059.0
Subtracting 6174 from 6803 leaves us with 629.
Grab the next digit (7) from the dividend, add it to 629, then carry on: 6297 / 686

Advancing to step 7:
If we divide 6297 by 686, we get 9 and a remainder of 123.
The next digit of our result is 9. 
Result so far: 10599.0
Deduct 6174 from 6297 and we're left with 123.
Fetch the next digit (1) from the dividend, attach it to 123 and continue: 1231 / 686

Advancing to step 8:
1231 divided by 686 is 1 with a remainder of 545.
Put 1 as the next digit of the answer. 
Result so far: 105991.0
Subtracting 686 from 1231 leaves us with 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Step 9:
686 can be fit into 5450 7 times, resulting in a remainder of 648.
Record the quotient 7 as the next digit in the result. 
Result so far: 105991.7
Deduct 4802 from 5450 and we're left with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

On to step 10:
The number 686 fits into 6480 9 times, leaving a remainder of 306.
Put 9 as the next digit of the answer. 
Result so far: 105991.79
Subtract 6174 from 6480 to get 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Let's proceed to step 11:
The number 686 fits into 3060 4 times, leaving a remainder of 316.
The number 4 becomes the next digit in our result. 
Result so far: 105991.794
If we subtract 2744 from 3060, we get 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

On to step 12:
3160 divided by 686 is 4 with a remainder of 416.
Use 4 as the next digit of our solution. 
Result so far: 105991.7944
If we subtract 2744 from 3160, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

After the division, we end up with 105991.7944 and a remainder of 0.00416.