We're dividing 860826 by 639 
The aim is to understand the frequency of 639 in 860826.

Let's proceed to step 1:
When dividing 8 by 639, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 639

On to step 2:
86 divided by 639 is 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Fetch the next digit (0) from the dividend, attach it to 86 and continue: 860 / 639

Step 3:
When dividing 860 by 639, we get 1 with a remainder of 221.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 639 from 860, we get 221.
Bring next digit (8) of the dividend behind the 221 and repeat the process: 2218 / 639

On to step 4:
When dividing 2218 by 639, we get 3 with a remainder of 301.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we subtract 1917 from 2218, we get 301.
Bring next digit (2) of the dividend behind the 301 and repeat the process: 3012 / 639

Going ahead to step 5:
When dividing 3012 by 639, we get 4 with a remainder of 456.
Record the quotient 4 as the next digit in the result. 
Result so far: 134.0
Deduct 2556 from 3012 and we're left with 456.
Bring next digit (6) of the dividend behind the 456 and repeat the process: 4566 / 639

Moving on to step 6:
4566 divided by 639 is 7 with a remainder of 93.
Put 7 as the next digit of the answer. 
Result so far: 1347.0
Subtracting 4473 from 4566 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 7:
639 can be fit into 930 1 times, resulting in a remainder of 291.
Use 1 as the next digit of our solution. 
Result so far: 1347.1
Subtract 639 from 930 to get 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Step 8:
2910 divided by 639 is 4 with a remainder of 354.
The next digit of our result is 4. 
Result so far: 1347.14
Deduct 2556 from 2910 and we're left with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

On to step 9:
639 goes into 3540 5 times with a remainder of 345.
Write down 5 as next digit of the result. 
Result so far: 1347.145
If we subtract 3195 from 3540, we get 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

On to step 10:
When dividing 3450 by 639, we get 5 with a remainder of 255.
Use 5 as the next digit of our solution. 
Result so far: 1347.1455
If we take 3195 away from 3450, we end up with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

The quotient of the division is 1347.1455, and the remainder is 0.00255.