Let's divide 687387 by 39
The aim is to understand the frequency of 39 in 687387.

Step 1:
6 divided by 39 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 39

Moving on to step 2:
The number 39 fits into 68 1 times, leaving a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 39 from 68 and we're left with 29.
Grab the next digit (7) from the dividend, add it to 29, then carry on: 297 / 39

Advancing to step 3:
The number 39 fits into 297 7 times, leaving a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Deduct 273 from 297 and we're left with 24.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 39

Moving on to step 4:
39 can be fit into 243 6 times, resulting in a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 176.0
Subtracting 234 from 243 leaves us with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 39

Moving on to step 5:
39 goes into 98 2 times with a remainder of 20.
The next digit of our result is 2. 
Result so far: 1762.0
Deduct 78 from 98 and we're left with 20.
Grab the next digit (7) from the dividend, add it to 20, then carry on: 207 / 39

Let's proceed to step 6:
39 can be fit into 207 5 times, resulting in a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 17625.0
Subtract 195 from 207 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
If we divide 120 by 39, we get 3 and a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 17625.3
The remainder is 3 after subtracting 117 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 8:
When dividing 30 by 39, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 17625.3
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
39 can be fit into 300 7 times, resulting in a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 17625.307
Subtract 273 from 300 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 10:
39 goes into 270 6 times with a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 17625.3076
Deduct 234 from 270 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 11:
360 divided by 39 is 9 with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 17625.30769
Subtracting 351 from 360 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 12:
90 divided by 39 is 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 17625.307692
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 13:
39 can be fit into 120 3 times, resulting in a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 17625.3076923
Subtracting 117 from 120 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 14:
39 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 17625.3076923
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 17625.3076923 with a remaining 3e-08.