78592479 divided by 686 
The aim is to understand the frequency of 686 in 78592479.

Moving on to step 1:
686 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 686

On to step 2:
When dividing 78 by 686, we get 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Grab the next digit (5) from the dividend, add it to 78, then carry on: 785 / 686

Let's proceed to step 3:
686 can be fit into 785 1 times, resulting in a remainder of 99.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 686 from 785 leaves us with 99.
Append the next digit (9) from the dividend to 99 and continue with: 999 / 686

Let's proceed to step 4:
999 divided by 686 is 1 with a remainder of 313.
Put 1 as the next digit of the answer. 
Result so far: 11.0
The remainder is 313 after subtracting 686 from 999.
Take the next digit (2) from the dividend and append it to 313, then repeat: 3132 / 686

On to step 5:
If we divide 3132 by 686, we get 4 and a remainder of 388.
The number 4 becomes the next digit in our result. 
Result so far: 114.0
Deduct 2744 from 3132 and we're left with 388.
Grab the next digit (4) from the dividend, add it to 388, then carry on: 3884 / 686

On to step 6:
If we divide 3884 by 686, we get 5 and a remainder of 454.
Record the quotient 5 as the next digit in the result. 
Result so far: 1145.0
Deduct 3430 from 3884 and we're left with 454.
Include the next digit (7) from the dividend after 454, then repeat: 4547 / 686

Advancing to step 7:
When dividing 4547 by 686, we get 6 with a remainder of 431.
The next digit of our result is 6. 
Result so far: 11456.0
The remainder is 431 after subtracting 4116 from 4547.
Take the next digit (9) from the dividend and append it to 431, then repeat: 4319 / 686

Moving on to step 8:
If we divide 4319 by 686, we get 6 and a remainder of 203.
Put 6 as the next digit of the answer. 
Result so far: 114566.0
If we take 4116 away from 4319, we end up with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Step 9:
2030 divided by 686 is 2 with a remainder of 658.
Record the quotient 2 as the next digit in the result. 
Result so far: 114566.2
Deduct 1372 from 2030 and we're left with 658.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

Going ahead to step 10:
If we divide 6580 by 686, we get 9 and a remainder of 406.
Write down 9 as next digit of the result. 
Result so far: 114566.29
Deduct 6174 from 6580 and we're left with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Moving on to step 11:
686 can be fit into 4060 5 times, resulting in a remainder of 630.
Use 5 as the next digit of our solution. 
Result so far: 114566.295
The remainder is 630 after subtracting 3430 from 4060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Step 12:
When dividing 6300 by 686, we get 9 with a remainder of 126.
Record the quotient 9 as the next digit in the result. 
Result so far: 114566.2959
If we subtract 6174 from 6300, we get 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 13:
1260 divided by 686 is 1 with a remainder of 574.
Write down 1 as next digit of the result. 
Result so far: 114566.29591
Subtract 686 from 1260 to 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 14:
686 can be fit into 5740 8 times, resulting in a remainder of 252.
Put 8 as the next digit of the answer. 
Result so far: 114566.295918
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.

Step 15:
2520 divided by 686 is 3 with a remainder of 462.
Put 3 as the next digit of the answer. 
Result so far: 114566.2959183
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.

Going ahead to step 16:
If we divide 4620 by 686, we get 6 and a remainder of 504.
The next digit of our result is 6. 
Result so far: 114566.29591836
If we subtract 4116 from 4620, we get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

After the division, we end up with 114566.29591836 and a remainder of 5.04e-07.