We look at the division of 99721705 by 543 
The aim is to understand the frequency of 543 in 99721705.

On to step 1:
543 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 543

Let's proceed to step 2:
When dividing 99 by 543, we get 0 with a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Grab the next digit (7) from the dividend, add it to 99, then carry on: 997 / 543

Step 3:
When dividing 997 by 543, we get 1 with a remainder of 454.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 543 from 997, we get 454.
Take the next digit (2) from the dividend and append it to 454, then repeat: 4542 / 543

Moving on to step 4:
When dividing 4542 by 543, we get 8 with a remainder of 198.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Subtract 4344 from 4542 to get 198.
Take the next digit (1) from the dividend and append it to 198, then repeat: 1981 / 543

Moving on to step 5:
The number 543 fits into 1981 3 times, leaving a remainder of 352.
The next digit of our result is 3. 
Result so far: 183.0
Deduct 1629 from 1981 and we're left with 352.
Bring next digit (7) of the dividend behind the 352 and repeat the process: 3527 / 543

Let's proceed to step 6:
When dividing 3527 by 543, we get 6 with a remainder of 269.
The next digit of our result is 6. 
Result so far: 1836.0
The remainder is 269 after subtracting 3258 from 3527.
Include the next digit (0) from the dividend after 269, then repeat: 2690 / 543

Going ahead to step 7:
2690 divided by 543 is 4 with a remainder of 518.
Record the quotient 4 as the next digit in the result. 
Result so far: 18364.0
The remainder is 518 after subtracting 2172 from 2690.
Bring next digit (5) of the dividend behind the 518 and repeat the process: 5185 / 543

Step 8:
543 goes into 5185 9 times with a remainder of 298.
Record the quotient 9 as the next digit in the result. 
Result so far: 183649.0
Deduct 4887 from 5185 and we're left with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Step 9:
2980 divided by 543 is 5 with a remainder of 265.
The number 5 becomes the next digit in our result. 
Result so far: 183649.5
Deduct 2715 from 2980 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Moving on to step 10:
If we divide 2650 by 543, we get 4 and a remainder of 478.
Write down 4 as next digit of the result. 
Result so far: 183649.54
Subtract 2172 from 2650 to get 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Moving on to step 11:
When dividing 4780 by 543, we get 8 with a remainder of 436.
The number 8 becomes the next digit in our result. 
Result so far: 183649.548
If we subtract 4344 from 4780, we get 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Step 12:
If we divide 4360 by 543, we get 8 and a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 183649.5488
Subtract 4344 from 4360 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.

The quotient of the division is 183649.5488, and the remainder is 0.00016.