We look at the division of 33721110 by 839 
The aim is to understand the frequency of 839 in 33721110.

On to step 1:
The number 839 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 839

On to step 2:
When dividing 33 by 839, we get 0 with a remainder of 33.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 33, we get 33.
Bring next digit (7) of the dividend behind the 33 and repeat the process: 337 / 839

Going ahead to step 3:
839 goes into 337 0 times with a remainder of 337.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 337, we end up with 337.
Include the next digit (2) from the dividend after 337, then repeat: 3372 / 839

Let's proceed to step 4:
The number 839 fits into 3372 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 16 after subtracting 3356 from 3372.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 839

Moving on to step 5:
When dividing 161 by 839, we get 0 with a remainder of 161.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
The remainder is 161 after subtracting 0 from 161.
Include the next digit (1) from the dividend after 161, then repeat: 1611 / 839

Moving on to step 6:
The number 839 fits into 1611 1 times, leaving a remainder of 772.
Put 1 as the next digit of the answer. 
Result so far: 401.0
If we take 839 away from 1611, we end up with 772.
Grab the next digit (1) from the dividend, add it to 772, then carry on: 7721 / 839

Let's proceed to step 7:
7721 divided by 839 is 9 with a remainder of 170.
The next digit of our result is 9. 
Result so far: 4019.0
The remainder is 170 after subtracting 7551 from 7721.
Fetch the next digit (0) from the dividend, attach it to 170 and continue: 1700 / 839

Step 8:
The number 839 fits into 1700 2 times, leaving a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 40192.0
If we take 1678 away from 1700, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 9:
839 can be fit into 220 0 times, resulting in a remainder of 220.
Put 0 as the next digit of the answer. 
Result so far: 40192.0
The remainder is 220 after subtracting 0 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 10:
If we divide 2200 by 839, we get 2 and a remainder of 522.
Use 2 as the next digit of our solution. 
Result so far: 40192.02
The remainder is 522 after subtracting 1678 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Step 11:
If we divide 5220 by 839, we get 6 and a remainder of 186.
Put 6 as the next digit of the answer. 
Result so far: 40192.026
Subtracting 5034 from 5220 leaves us with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Going ahead to step 12:
If we divide 1860 by 839, we get 2 and a remainder of 182.
The next digit of our result is 2. 
Result so far: 40192.0262
If we subtract 1678 from 1860, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Advancing to step 13:
The number 839 fits into 1820 2 times, leaving a remainder of 142.
Write down 2 as next digit of the result. 
Result so far: 40192.02622
Subtracting 1678 from 1820 leaves us with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

After the division, we end up with 40192.02622 and a remainder of 0.000142.