13633526 divided by 639 
The aim is to understand the frequency of 639 in 13633526.

Let's proceed to step 1:
1 divided by 639 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 639

Going ahead to step 2:
If we divide 13 by 639, we get 0 and a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 639

Let's proceed to step 3:
136 divided by 639 is 0 with a remainder of 136.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 136, we get 136.
Take the next digit (3) from the dividend and append it to 136, then repeat: 1363 / 639

Step 4:
639 can be fit into 1363 2 times, resulting in a remainder of 85.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1278 from 1363, we get 85.
Append the next digit (3) from the dividend to 85 and continue with: 853 / 639

Moving on to step 5:
639 goes into 853 1 times with a remainder of 214.
The next digit of our result is 1. 
Result so far: 21.0
The remainder is 214 after subtracting 639 from 853.
Bring next digit (5) of the dividend behind the 214 and repeat the process: 2145 / 639

Going ahead to step 6:
The number 639 fits into 2145 3 times, leaving a remainder of 228.
The number 3 becomes the next digit in our result. 
Result so far: 213.0
If we take 1917 away from 2145, we end up with 228.
Include the next digit (2) from the dividend after 228, then repeat: 2282 / 639

Going ahead to step 7:
639 goes into 2282 3 times with a remainder of 365.
Write down 3 as next digit of the result. 
Result so far: 2133.0
Subtract 1917 from 2282 to get 365.
Fetch the next digit (6) from the dividend, attach it to 365 and continue: 3656 / 639

Advancing to step 8:
If we divide 3656 by 639, we get 5 and a remainder of 461.
Write down 5 as next digit of the result. 
Result so far: 21335.0
Subtract 3195 from 3656 to get 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

Step 9:
If we divide 4610 by 639, we get 7 and a remainder of 137.
The next digit of our result is 7. 
Result so far: 21335.7
Deduct 4473 from 4610 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Step 10:
639 can be fit into 1370 2 times, resulting in a remainder of 92.
Write down 2 as next digit of the result. 
Result so far: 21335.72
The remainder is 92 after subtracting 1278 from 1370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 11:
639 can be fit into 920 1 times, resulting in a remainder of 281.
Use 1 as the next digit of our solution. 
Result so far: 21335.721
Subtracting 639 from 920 leaves us with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

On to step 12:
The number 639 fits into 2810 4 times, leaving a remainder of 254.
Record the quotient 4 as the next digit in the result. 
Result so far: 21335.7214
Deduct 2556 from 2810 and we're left with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Advancing to step 13:
The number 639 fits into 2540 3 times, leaving a remainder of 623.
The next digit of our result is 3. 
Result so far: 21335.72143
Subtract 1917 from 2540 to get 623.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

On to step 14:
639 goes into 6230 9 times with a remainder of 479.
Put 9 as the next digit of the answer. 
Result so far: 21335.721439
The remainder is 479 after subtracting 5751 from 6230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Moving on to step 15:
When dividing 4790 by 639, we get 7 with a remainder of 317.
The next digit of our result is 7. 
Result so far: 21335.7214397
Subtracting 4473 from 4790 leaves us with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Advancing to step 16:
When dividing 3170 by 639, we get 4 with a remainder of 614.
Write down 4 as next digit of the result. 
Result so far: 21335.72143974
Deduct 2556 from 3170 and we're left with 614.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6140, and continue the process.

The final result is 21335.72143974 with a remainder of 6.14e-07.