15386508 divided by 639 
The aim is to understand the frequency of 639 in 15386508.

Advancing to step 1:
If we divide 1 by 639, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 639

Going ahead to step 2:
639 goes into 15 0 times with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 639

On to step 3:
639 goes into 153 0 times with a remainder of 153.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 153 after subtracting 0 from 153.
Grab the next digit (8) from the dividend, add it to 153, then carry on: 1538 / 639

Going ahead to step 4:
639 goes into 1538 2 times with a remainder of 260.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 260 after subtracting 1278 from 1538.
Fetch the next digit (6) from the dividend, attach it to 260 and continue: 2606 / 639

Advancing to step 5:
The number 639 fits into 2606 4 times, leaving a remainder of 50.
Put 4 as the next digit of the answer. 
Result so far: 24.0
If we take 2556 away from 2606, we end up with 50.
Grab the next digit (5) from the dividend, add it to 50, then carry on: 505 / 639

Going ahead to step 6:
The number 639 fits into 505 0 times, leaving a remainder of 505.
Write down 0 as next digit of the result. 
Result so far: 240.0
If we take 0 away from 505, we end up with 505.
Bring next digit (0) of the dividend behind the 505 and repeat the process: 5050 / 639

On to step 7:
The number 639 fits into 5050 7 times, leaving a remainder of 577.
Record the quotient 7 as the next digit in the result. 
Result so far: 2407.0
Subtracting 4473 from 5050 leaves us with 577.
Include the next digit (8) from the dividend after 577, then repeat: 5778 / 639

Moving on to step 8:
5778 divided by 639 is 9 with a remainder of 27.
The next digit of our result is 9. 
Result so far: 24079.0
Subtracting 5751 from 5778 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 9:
When dividing 270 by 639, we get 0 with a remainder of 270.
The number 0 becomes the next digit in our result. 
Result so far: 24079.0
Subtracting 0 from 270 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

On to step 10:
If we divide 2700 by 639, we get 4 and a remainder of 144.
The number 4 becomes the next digit in our result. 
Result so far: 24079.04
Subtract 2556 from 2700 to get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Moving on to step 11:
The number 639 fits into 1440 2 times, leaving a remainder of 162.
Record the quotient 2 as the next digit in the result. 
Result so far: 24079.042
If we subtract 1278 from 1440, we get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Going ahead to step 12:
639 goes into 1620 2 times with a remainder of 342.
The number 2 becomes the next digit in our result. 
Result so far: 24079.0422
Subtract 1278 from 1620 to get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Our division results in 24079.0422 with a remaining 0.00342.