We look at the division of 43000437 by 686 
The aim is to understand the frequency of 686 in 43000437.

Let's proceed to step 1:
The number 686 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 686

Step 2:
43 divided by 686 is 0 with a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Take the next digit (0) from the dividend and append it to 43, then repeat: 430 / 686

Moving on to step 3:
686 goes into 430 0 times with a remainder of 430.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 430, we get 430.
Grab the next digit (0) from the dividend, add it to 430, then carry on: 4300 / 686

On to step 4:
686 can be fit into 4300 6 times, resulting in a remainder of 184.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 184 after subtracting 4116 from 4300.
Include the next digit (0) from the dividend after 184, then repeat: 1840 / 686

Step 5:
If we divide 1840 by 686, we get 2 and a remainder of 468.
The next digit of our result is 2. 
Result so far: 62.0
If we subtract 1372 from 1840, we get 468.
Append the next digit (4) from the dividend to 468 and continue with: 4684 / 686

Let's proceed to step 6:
4684 divided by 686 is 6 with a remainder of 568.
Use 6 as the next digit of our solution. 
Result so far: 626.0
Subtract 4116 from 4684 to get 568.
Grab the next digit (3) from the dividend, add it to 568, then carry on: 5683 / 686

Going ahead to step 7:
When dividing 5683 by 686, we get 8 with a remainder of 195.
Put 8 as the next digit of the answer. 
Result so far: 6268.0
If we take 5488 away from 5683, we end up with 195.
Include the next digit (7) from the dividend after 195, then repeat: 1957 / 686

On to step 8:
686 goes into 1957 2 times with a remainder of 585.
Put 2 as the next digit of the answer. 
Result so far: 62682.0
Subtract 1372 from 1957 to get 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Step 9:
When dividing 5850 by 686, we get 8 with a remainder of 362.
Record the quotient 8 as the next digit in the result. 
Result so far: 62682.8
The remainder is 362 after subtracting 5488 from 5850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Moving on to step 10:
If we divide 3620 by 686, we get 5 and a remainder of 190.
Put 5 as the next digit of the answer. 
Result so far: 62682.85
If we subtract 3430 from 3620, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 11:
If we divide 1900 by 686, we get 2 and a remainder of 528.
Write down 2 as next digit of the result. 
Result so far: 62682.852
If we subtract 1372 from 1900, we get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Going ahead to step 12:
686 goes into 5280 7 times with a remainder of 478.
Write down 7 as next digit of the result. 
Result so far: 62682.8527
If we take 4802 away from 5280, we end up with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

On to step 13:
If we divide 4780 by 686, we get 6 and a remainder of 664.
Use 6 as the next digit of our solution. 
Result so far: 62682.85276
If we subtract 4116 from 4780, we get 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Step 14:
When dividing 6640 by 686, we get 9 with a remainder of 466.
Use 9 as the next digit of our solution. 
Result so far: 62682.852769
The remainder is 466 after subtracting 6174 from 6640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Step 15:
If we divide 4660 by 686, we get 6 and a remainder of 544.
The next digit of our result is 6. 
Result so far: 62682.8527696
Deduct 4116 from 4660 and we're left with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Advancing to step 16:
The number 686 fits into 5440 7 times, leaving a remainder of 638.
Record the quotient 7 as the next digit in the result. 
Result so far: 62682.85276967
Deduct 4802 from 5440 and we're left with 638.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

The final result is 62682.85276967 with a remainder of 6.38e-07.