We're dividing 35025734 by 639 
The aim is to understand the frequency of 639 in 35025734.

Let's proceed to step 1:
3 divided by 639 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 639

Let's proceed to step 2:
639 goes into 35 0 times with a remainder of 35.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Append the next digit (0) from the dividend to 35 and continue with: 350 / 639

Moving on to step 3:
350 divided by 639 is 0 with a remainder of 350.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 350 after subtracting 0 from 350.
Bring next digit (2) of the dividend behind the 350 and repeat the process: 3502 / 639

Let's proceed to step 4:
If we divide 3502 by 639, we get 5 and a remainder of 307.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 3195 from 3502 leaves us with 307.
Bring next digit (5) of the dividend behind the 307 and repeat the process: 3075 / 639

Going ahead to step 5:
When dividing 3075 by 639, we get 4 with a remainder of 519.
Put 4 as the next digit of the answer. 
Result so far: 54.0
Deduct 2556 from 3075 and we're left with 519.
Take the next digit (7) from the dividend and append it to 519, then repeat: 5197 / 639

Advancing to step 6:
5197 divided by 639 is 8 with a remainder of 85.
Put 8 as the next digit of the answer. 
Result so far: 548.0
If we subtract 5112 from 5197, we get 85.
Include the next digit (3) from the dividend after 85, then repeat: 853 / 639

Going ahead to step 7:
639 can be fit into 853 1 times, resulting in a remainder of 214.
The number 1 becomes the next digit in our result. 
Result so far: 5481.0
Subtracting 639 from 853 leaves us with 214.
Grab the next digit (4) from the dividend, add it to 214, then carry on: 2144 / 639

Let's proceed to step 8:
2144 divided by 639 is 3 with a remainder of 227.
Record the quotient 3 as the next digit in the result. 
Result so far: 54813.0
If we subtract 1917 from 2144, we get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Let's proceed to step 9:
2270 divided by 639 is 3 with a remainder of 353.
The next digit of our result is 3. 
Result so far: 54813.3
The remainder is 353 after subtracting 1917 from 2270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Going ahead to step 10:
If we divide 3530 by 639, we get 5 and a remainder of 335.
Record the quotient 5 as the next digit in the result. 
Result so far: 54813.35
Subtracting 3195 from 3530 leaves us with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Moving on to step 11:
When dividing 3350 by 639, we get 5 with a remainder of 155.
The next digit of our result is 5. 
Result so far: 54813.355
Deduct 3195 from 3350 and we're left with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

After the division, we end up with 54813.355 and a remainder of 0.0155.