We look at the division of 70649064 by 686 
The aim is to understand the frequency of 686 in 70649064.

Moving on to step 1:
7 divided by 686 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 686

Let's proceed to step 2:
If we divide 70 by 686, we get 0 and a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 70, we get 70.
Include the next digit (6) from the dividend after 70, then repeat: 706 / 686

Going ahead to step 3:
When dividing 706 by 686, we get 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 686 from 706, we get 20.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 686

Going ahead to step 4:
The number 686 fits into 204 0 times, leaving a remainder of 204.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 204, we get 204.
Append the next digit (9) from the dividend to 204 and continue with: 2049 / 686

Step 5:
If we divide 2049 by 686, we get 2 and a remainder of 677.
Put 2 as the next digit of the answer. 
Result so far: 102.0
Deduct 1372 from 2049 and we're left with 677.
Bring next digit (0) of the dividend behind the 677 and repeat the process: 6770 / 686

Step 6:
When dividing 6770 by 686, we get 9 with a remainder of 596.
Put 9 as the next digit of the answer. 
Result so far: 1029.0
If we subtract 6174 from 6770, we get 596.
Grab the next digit (6) from the dividend, add it to 596, then carry on: 5966 / 686

Going ahead to step 7:
686 can be fit into 5966 8 times, resulting in a remainder of 478.
Use 8 as the next digit of our solution. 
Result so far: 10298.0
Deduct 5488 from 5966 and we're left with 478.
Grab the next digit (4) from the dividend, add it to 478, then carry on: 4784 / 686

On to step 8:
The number 686 fits into 4784 6 times, leaving a remainder of 668.
Put 6 as the next digit of the answer. 
Result so far: 102986.0
Deduct 4116 from 4784 and we're left with 668.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6680, and continue the process.

Let's proceed to step 9:
6680 divided by 686 is 9 with a remainder of 506.
The number 9 becomes the next digit in our result. 
Result so far: 102986.9
The remainder is 506 after subtracting 6174 from 6680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Advancing to step 10:
5060 divided by 686 is 7 with a remainder of 258.
Put 7 as the next digit of the answer. 
Result so far: 102986.97
If we take 4802 away from 5060, we end up with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 11:
When dividing 2580 by 686, we get 3 with a remainder of 522.
Use 3 as the next digit of our solution. 
Result so far: 102986.973
Subtracting 2058 from 2580 leaves us with 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Step 12:
5220 divided by 686 is 7 with a remainder of 418.
The next digit of our result is 7. 
Result so far: 102986.9737
Deduct 4802 from 5220 and we're left with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

On to step 13:
686 goes into 4180 6 times with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 102986.97376
If we subtract 4116 from 4180, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 14:
686 goes into 640 0 times with a remainder of 640.
Use 0 as the next digit of our solution. 
Result so far: 102986.97376
Subtracting 0 from 640 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 15:
686 goes into 6400 9 times with a remainder of 226.
Record the quotient 9 as the next digit in the result. 
Result so far: 102986.9737609
If we take 6174 away from 6400, we end up with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Let's proceed to step 16:
The number 686 fits into 2260 3 times, leaving a remainder of 202.
The number 3 becomes the next digit in our result. 
Result so far: 102986.97376093
Deduct 2058 from 2260 and we're left with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

The final outcome is 102986.97376093, with a leftover of 2.02e-07.