We divide 2869990 by 639
The aim is to understand the frequency of 639 in 2869990.

Advancing to step 1:
639 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 639

Moving on to step 2:
639 goes into 28 0 times with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 639

Step 3:
639 goes into 286 0 times with a remainder of 286.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 286, we get 286.
Include the next digit (9) from the dividend after 286, then repeat: 2869 / 639

Advancing to step 4:
The number 639 fits into 2869 4 times, leaving a remainder of 313.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 2556 away from 2869, we end up with 313.
Bring next digit (9) of the dividend behind the 313 and repeat the process: 3139 / 639

Moving on to step 5:
639 goes into 3139 4 times with a remainder of 583.
Put 4 as the next digit of the answer. 
Result so far: 44.0
Deduct 2556 from 3139 and we're left with 583.
Append the next digit (9) from the dividend to 583 and continue with: 5839 / 639

Moving on to step 6:
5839 divided by 639 is 9 with a remainder of 88.
The number 9 becomes the next digit in our result. 
Result so far: 449.0
Subtract 5751 from 5839 to get 88.
Include the next digit (0) from the dividend after 88, then repeat: 880 / 639

Moving on to step 7:
639 can be fit into 880 1 times, resulting in a remainder of 241.
The number 1 becomes the next digit in our result. 
Result so far: 4491.0
Subtract 639 from 880 to get 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Step 8:
If we divide 2410 by 639, we get 3 and a remainder of 493.
The next digit of our result is 3. 
Result so far: 4491.3
The remainder is 493 after subtracting 1917 from 2410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4930, and continue the process.

On to step 9:
If we divide 4930 by 639, we get 7 and a remainder of 457.
The next digit of our result is 7. 
Result so far: 4491.37
Deduct 4473 from 4930 and we're left with 457.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4570, and continue the process.

Going ahead to step 10:
639 can be fit into 4570 7 times, resulting in a remainder of 97.
The number 7 becomes the next digit in our result. 
Result so far: 4491.377
Deduct 4473 from 4570 and we're left with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

The final result is 4491.377 with a remainder of 0.0097.