Let's divide 15343996 by 687
The aim is to understand the frequency of 687 in 15343996.

Step 1:
The number 687 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 687

Going ahead to step 2:
15 divided by 687 is 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Take the next digit (3) from the dividend and append it to 15, then repeat: 153 / 687

Moving on to step 3:
The number 687 fits into 153 0 times, leaving a remainder of 153.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 153, we get 153.
Append the next digit (4) from the dividend to 153 and continue with: 1534 / 687

On to step 4:
When dividing 1534 by 687, we get 2 with a remainder of 160.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 160 after subtracting 1374 from 1534.
Append the next digit (3) from the dividend to 160 and continue with: 1603 / 687

Step 5:
687 goes into 1603 2 times with a remainder of 229.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Subtracting 1374 from 1603 leaves us with 229.
Bring next digit (9) of the dividend behind the 229 and repeat the process: 2299 / 687

Advancing to step 6:
687 goes into 2299 3 times with a remainder of 238.
Put 3 as the next digit of the answer. 
Result so far: 223.0
Deduct 2061 from 2299 and we're left with 238.
Take the next digit (9) from the dividend and append it to 238, then repeat: 2389 / 687

Going ahead to step 7:
If we divide 2389 by 687, we get 3 and a remainder of 328.
The next digit of our result is 3. 
Result so far: 2233.0
The remainder is 328 after subtracting 2061 from 2389.
Bring next digit (6) of the dividend behind the 328 and repeat the process: 3286 / 687

Moving on to step 8:
3286 divided by 687 is 4 with a remainder of 538.
The next digit of our result is 4. 
Result so far: 22334.0
The remainder is 538 after subtracting 2748 from 3286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Advancing to step 9:
If we divide 5380 by 687, we get 7 and a remainder of 571.
The next digit of our result is 7. 
Result so far: 22334.7
The remainder is 571 after subtracting 4809 from 5380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5710, and continue the process.

On to step 10:
When dividing 5710 by 687, we get 8 with a remainder of 214.
Use 8 as the next digit of our solution. 
Result so far: 22334.78
Subtracting 5496 from 5710 leaves us with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Going ahead to step 11:
When dividing 2140 by 687, we get 3 with a remainder of 79.
The next digit of our result is 3. 
Result so far: 22334.783
The remainder is 79 after subtracting 2061 from 2140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 12:
When dividing 790 by 687, we get 1 with a remainder of 103.
The next digit of our result is 1. 
Result so far: 22334.7831
Subtract 687 from 790 to get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Let's proceed to step 13:
If we divide 1030 by 687, we get 1 and a remainder of 343.
The number 1 becomes the next digit in our result. 
Result so far: 22334.78311
If we take 687 away from 1030, we end up with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

The final result is 22334.78311 with a remainder of 0.000343.