39031246 ÷ 855 
The aim is to understand the frequency of 855 in 39031246.

Step 1:
If we divide 3 by 855, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 855

Moving on to step 2:
855 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Append the next digit (0) from the dividend to 39 and continue with: 390 / 855

Step 3:
855 goes into 390 0 times with a remainder of 390.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 390 leaves us with 390.
Take the next digit (3) from the dividend and append it to 390, then repeat: 3903 / 855

Step 4:
If we divide 3903 by 855, we get 4 and a remainder of 483.
The next digit of our result is 4. 
Result so far: 4.0
If we take 3420 away from 3903, we end up with 483.
Grab the next digit (1) from the dividend, add it to 483, then carry on: 4831 / 855

Going ahead to step 5:
The number 855 fits into 4831 5 times, leaving a remainder of 556.
Use 5 as the next digit of our solution. 
Result so far: 45.0
Deduct 4275 from 4831 and we're left with 556.
Grab the next digit (2) from the dividend, add it to 556, then carry on: 5562 / 855

On to step 6:
855 goes into 5562 6 times with a remainder of 432.
The number 6 becomes the next digit in our result. 
Result so far: 456.0
Subtract 5130 from 5562 to get 432.
Fetch the next digit (4) from the dividend, attach it to 432 and continue: 4324 / 855

On to step 7:
If we divide 4324 by 855, we get 5 and a remainder of 49.
Record the quotient 5 as the next digit in the result. 
Result so far: 4565.0
Deduct 4275 from 4324 and we're left with 49.
Fetch the next digit (6) from the dividend, attach it to 49 and continue: 496 / 855

Step 8:
855 goes into 496 0 times with a remainder of 496.
The number 0 becomes the next digit in our result. 
Result so far: 45650.0
Deduct 0 from 496 and we're left with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Going ahead to step 9:
If we divide 4960 by 855, we get 5 and a remainder of 685.
Record the quotient 5 as the next digit in the result. 
Result so far: 45650.5
If we take 4275 away from 4960, we end up with 685.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6850, and continue the process.

Let's proceed to step 10:
6850 divided by 855 is 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 45650.58
Subtract 6840 from 6850 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
855 goes into 100 0 times with a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 45650.58
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 12:
If we divide 1000 by 855, we get 1 and a remainder of 145.
Use 1 as the next digit of our solution. 
Result so far: 45650.5801
Subtracting 855 from 1000 leaves us with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Let's proceed to step 13:
When dividing 1450 by 855, we get 1 with a remainder of 595.
Use 1 as the next digit of our solution. 
Result so far: 45650.58011
Subtracting 855 from 1450 leaves us with 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

After the division, we end up with 45650.58011 and a remainder of 0.000595.