We look at the division of 715110 by 42 
The aim is to understand the frequency of 42 in 715110.

On to step 1:
7 divided by 42 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 42

Moving on to step 2:
The number 42 fits into 71 1 times, leaving a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 42 away from 71, we end up with 29.
Bring next digit (5) of the dividend behind the 29 and repeat the process: 295 / 42

Advancing to step 3:
42 goes into 295 7 times with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
If we take 294 away from 295, we end up with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 42

Moving on to step 4:
When dividing 11 by 42, we get 0 with a remainder of 11.
The next digit of our result is 0. 
Result so far: 170.0
Deduct 0 from 11 and we're left with 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 42

Moving on to step 5:
If we divide 111 by 42, we get 2 and a remainder of 27.
Record the quotient 2 as the next digit in the result. 
Result so far: 1702.0
If we take 84 away from 111, we end up with 27.
Fetch the next digit (0) from the dividend, attach it to 27 and continue: 270 / 42

On to step 6:
42 goes into 270 6 times with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 17026.0
The remainder is 18 after subtracting 252 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 7:
42 can be fit into 180 4 times, resulting in a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 17026.4
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 8:
42 can be fit into 120 2 times, resulting in a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 17026.42
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
When dividing 360 by 42, we get 8 with a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 17026.428
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
240 divided by 42 is 5 with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 17026.4285
If we subtract 210 from 240, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
42 can be fit into 300 7 times, resulting in a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 17026.42857
If we take 294 away from 300, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
42 goes into 60 1 times with a remainder of 18.
The next digit of our result is 1. 
Result so far: 17026.428571
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 13:
The number 42 fits into 180 4 times, leaving a remainder of 12.
The next digit of our result is 4. 
Result so far: 17026.4285714
Subtracting 168 from 180 leaves us 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.

Moving on to step 14:
If we divide 120 by 42, we get 2 and a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 17026.42857142
Deduct 84 from 120 and we're left 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.

After the division, we end up with 17026.42857142 and a remainder of 3.6e-08.