We're dividing 75415442 by 543 
The aim is to understand the frequency of 543 in 75415442.

Going ahead to step 1:
When dividing 7 by 543, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 543

Step 2:
If we divide 75 by 543, we get 0 and a remainder of 75.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 75, we end up with 75.
Append the next digit (4) from the dividend to 75 and continue with: 754 / 543

Advancing to step 3:
The number 543 fits into 754 1 times, leaving a remainder of 211.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 543 from 754 and we're left with 211.
Include the next digit (1) from the dividend after 211, then repeat: 2111 / 543

Advancing to step 4:
2111 divided by 543 is 3 with a remainder of 482.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 482 after subtracting 1629 from 2111.
Bring next digit (5) of the dividend behind the 482 and repeat the process: 4825 / 543

Step 5:
When dividing 4825 by 543, we get 8 with a remainder of 481.
Use 8 as the next digit of our solution. 
Result so far: 138.0
If we subtract 4344 from 4825, we get 481.
Include the next digit (4) from the dividend after 481, then repeat: 4814 / 543

Let's proceed to step 6:
When dividing 4814 by 543, we get 8 with a remainder of 470.
Put 8 as the next digit of the answer. 
Result so far: 1388.0
Deduct 4344 from 4814 and we're left with 470.
Take the next digit (4) from the dividend and append it to 470, then repeat: 4704 / 543

Moving on to step 7:
543 goes into 4704 8 times with a remainder of 360.
Use 8 as the next digit of our solution. 
Result so far: 13888.0
Subtracting 4344 from 4704 leaves us with 360.
Bring next digit (2) of the dividend behind the 360 and repeat the process: 3602 / 543

Step 8:
543 can be fit into 3602 6 times, resulting in a remainder of 344.
Record the quotient 6 as the next digit in the result. 
Result so far: 138886.0
If we subtract 3258 from 3602, we get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Step 9:
543 goes into 3440 6 times with a remainder of 182.
The number 6 becomes the next digit in our result. 
Result so far: 138886.6
Subtracting 3258 from 3440 leaves us with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Let's proceed to step 10:
543 goes into 1820 3 times with a remainder of 191.
Put 3 as the next digit of the answer. 
Result so far: 138886.63
Subtracting 1629 from 1820 leaves us with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Going ahead to step 11:
If we divide 1910 by 543, we get 3 and a remainder of 281.
Write down 3 as next digit of the result. 
Result so far: 138886.633
The remainder is 281 after subtracting 1629 from 1910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

The quotient of the division is 138886.633, and the remainder is 0.0281.