70878864 ÷ 39 
The aim is to understand the frequency of 39 in 70878864.

Step 1:
If we divide 7 by 39, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 39

Moving on to step 2:
If we divide 70 by 39, we get 1 and a remainder of 31.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 39 away from 70, we end up with 31.
Grab the next digit (8) from the dividend, add it to 31, then carry on: 318 / 39

On to step 3:
If we divide 318 by 39, we get 8 and a remainder of 6.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 312 from 318 and we're left with 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 39

Step 4:
If we divide 67 by 39, we get 1 and a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 181.0
The remainder is 28 after subtracting 39 from 67.
Take the next digit (8) from the dividend and append it to 28, then repeat: 288 / 39

Advancing to step 5:
288 divided by 39 is 7 with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 1817.0
If we take 273 away from 288, we end up with 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 39

Moving on to step 6:
39 goes into 158 4 times with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 18174.0
If we subtract 156 from 158, we get 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 39

Advancing to step 7:
The number 39 fits into 26 0 times, leaving a remainder of 26.
The number 0 becomes the next digit in our result. 
Result so far: 181740.0
If we subtract 0 from 26, we get 26.
Append the next digit (4) from the dividend to 26 and continue with: 264 / 39

Moving on to step 8:
The number 39 fits into 264 6 times, leaving a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 1817406.0
Deduct 234 from 264 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
If we divide 300 by 39, we get 7 and a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 1817406.7
If we subtract 273 from 300, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 10:
270 divided by 39 is 6 with a remainder of 36.
The number 6 becomes the next digit in our result. 
Result so far: 1817406.76
The remainder is 36 after subtracting 234 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 11:
If we divide 360 by 39, we get 9 and a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 1817406.769
Subtract 351 from 360 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 12:
When dividing 90 by 39, we get 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 1817406.7692
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 13:
When dividing 120 by 39, we get 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 1817406.76923
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 14:
30 divided by 39 is 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 1817406.76923
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 15:
39 goes into 300 7 times with a remainder of 27.
The next digit of our result is 7. 
Result so far: 1817406.7692307
Deduct 273 from 300 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 16:
The number 39 fits into 270 6 times, leaving a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 1817406.76923076
If we take 234 away from 270, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Our division results in 1817406.76923076 with a remaining 3.6e-08.