We're dividing 75686616 by 543 
The aim is to understand the frequency of 543 in 75686616.

On to step 1:
If we divide 7 by 543, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 543

Going ahead to step 2:
When dividing 75 by 543, we get 0 with a remainder of 75.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 75, we get 75.
Bring next digit (6) of the dividend behind the 75 and repeat the process: 756 / 543

Going ahead to step 3:
When dividing 756 by 543, we get 1 with a remainder of 213.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 543 from 756 leaves us with 213.
Fetch the next digit (8) from the dividend, attach it to 213 and continue: 2138 / 543

Let's proceed to step 4:
2138 divided by 543 is 3 with a remainder of 509.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 1629 from 2138, we get 509.
Grab the next digit (6) from the dividend, add it to 509, then carry on: 5096 / 543

Going ahead to step 5:
If we divide 5096 by 543, we get 9 and a remainder of 209.
Put 9 as the next digit of the answer. 
Result so far: 139.0
The remainder is 209 after subtracting 4887 from 5096.
Fetch the next digit (6) from the dividend, attach it to 209 and continue: 2096 / 543

Step 6:
The number 543 fits into 2096 3 times, leaving a remainder of 467.
The number 3 becomes the next digit in our result. 
Result so far: 1393.0
Subtract 1629 from 2096 to get 467.
Append the next digit (1) from the dividend to 467 and continue with: 4671 / 543

Going ahead to step 7:
When dividing 4671 by 543, we get 8 with a remainder of 327.
Use 8 as the next digit of our solution. 
Result so far: 13938.0
Subtract 4344 from 4671 to get 327.
Grab the next digit (6) from the dividend, add it to 327, then carry on: 3276 / 543

Going ahead to step 8:
If we divide 3276 by 543, we get 6 and a remainder of 18.
Record the quotient 6 as the next digit in the result. 
Result so far: 139386.0
Subtracting 3258 from 3276 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
180 divided by 543 is 0 with a remainder of 180.
Put 0 as the next digit of the answer. 
Result so far: 139386.0
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 10:
1800 divided by 543 is 3 with a remainder of 171.
Put 3 as the next digit of the answer. 
Result so far: 139386.03
The remainder is 171 after subtracting 1629 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Let's proceed to step 11:
If we divide 1710 by 543, we get 3 and a remainder of 81.
Write down 3 as next digit of the result. 
Result so far: 139386.033
The remainder is 81 after subtracting 1629 from 1710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The quotient of the division is 139386.033, and the remainder is 0.0081.