We look at the division of 142236 by 75 
The aim is to understand the frequency of 75 in 142236.

Advancing to step 1:
The number 75 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 75

Going ahead to step 2:
14 divided by 75 is 0 with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 14 after subtracting 0 from 14.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 75

Going ahead to step 3:
75 can be fit into 142 1 times, resulting in a remainder of 67.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 75 from 142, we get 67.
Include the next digit (2) from the dividend after 67, then repeat: 672 / 75

Moving on to step 4:
When dividing 672 by 75, we get 8 with a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtract 600 from 672 to get 72.
Fetch the next digit (3) from the dividend, attach it to 72 and continue: 723 / 75

Advancing to step 5:
The number 75 fits into 723 9 times, leaving a remainder of 48.
Write down 9 as next digit of the result. 
Result so far: 189.0
Subtracting 675 from 723 leaves us with 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 75

Moving on to step 6:
75 goes into 486 6 times with a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 1896.0
Subtract 450 from 486 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.

Advancing to step 7:
The number 75 fits into 360 4 times, leaving a remainder of 60.
Put 4 as the next digit of the answer. 
Result so far: 1896.4
If we subtract 300 from 360, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
75 can be fit into 600 8 times, resulting in a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 1896.48
The remainder is 0 after subtracting 600 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
If we divide 0 by 75, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1896.48
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
75 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1896.48
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 1896.48 and a remainder of 0.0.