We look at the division of 718525 by 43 
The aim is to understand the frequency of 43 in 718525.

On to step 1:
43 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 43

Moving on to step 2:
If we divide 71 by 43, we get 1 and a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 43 from 71 to get 28.
Include the next digit (8) from the dividend after 28, then repeat: 288 / 43

On to step 3:
When dividing 288 by 43, we get 6 with a remainder of 30.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we take 258 away from 288, we end up with 30.
Grab the next digit (5) from the dividend, add it to 30, then carry on: 305 / 43

Moving on to step 4:
The number 43 fits into 305 7 times, leaving a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 167.0
If we subtract 301 from 305, we get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 43

Going ahead to step 5:
43 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 1670.0
Subtracting 0 from 42 leaves us with 42.
Grab the next digit (5) from the dividend, add it to 42, then carry on: 425 / 43

Going ahead to step 6:
The number 43 fits into 425 9 times, leaving a remainder of 38.
Use 9 as the next digit of our solution. 
Result so far: 16709.0
Deduct 387 from 425 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 7:
43 can be fit into 380 8 times, resulting in a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 16709.8
If we take 344 away from 380, 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.

On to step 8:
If we divide 360 by 43, we get 8 and a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 16709.88
Subtract 344 from 360 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 16709.88 and a remainder of 0.016.