We look at the division of 577512 by 43 
The aim is to understand the frequency of 43 in 577512.

Going ahead to step 1:
The number 43 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 43

Advancing to step 2:
57 divided by 43 is 1 with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 43 from 57 leaves us with 14.
Include the next digit (7) from the dividend after 14, then repeat: 147 / 43

Step 3:
If we divide 147 by 43, we get 3 and a remainder of 18.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 18 after subtracting 129 from 147.
Take the next digit (5) from the dividend and append it to 18, then repeat: 185 / 43

Step 4:
185 divided by 43 is 4 with a remainder of 13.
Write down 4 as next digit of the result. 
Result so far: 134.0
If we subtract 172 from 185, we get 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 43

Going ahead to step 5:
When dividing 131 by 43, we get 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 1343.0
If we take 129 away from 131, we end up with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 43

Moving on to step 6:
If we divide 22 by 43, we get 0 and a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 13430.0
Subtracting 0 from 22 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 7:
220 divided by 43 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 13430.5
If we subtract 215 from 220, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
The number 43 fits into 50 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 13430.51
Subtracting 43 from 50 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 9:
43 goes into 70 1 times with a remainder of 27.
The number 1 becomes the next digit in our result. 
Result so far: 13430.511
The remainder is 27 after subtracting 43 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The quotient of the division is 13430.511, and the remainder is 0.0027.