We look at the division of 53269608 by 243 
The aim is to understand the frequency of 243 in 53269608.

On to step 1:
243 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 243

Step 2:
The number 243 fits into 53 0 times, leaving a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Bring next digit (2) of the dividend behind the 53 and repeat the process: 532 / 243

Moving on to step 3:
When dividing 532 by 243, we get 2 with a remainder of 46.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 486 from 532 leaves us with 46.
Grab the next digit (6) from the dividend, add it to 46, then carry on: 466 / 243

Let's proceed to step 4:
243 goes into 466 1 times with a remainder of 223.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
The remainder is 223 after subtracting 243 from 466.
Take the next digit (9) from the dividend and append it to 223, then repeat: 2239 / 243

Let's proceed to step 5:
When dividing 2239 by 243, we get 9 with a remainder of 52.
The number 9 becomes the next digit in our result. 
Result so far: 219.0
Subtracting 2187 from 2239 leaves us with 52.
Include the next digit (6) from the dividend after 52, then repeat: 526 / 243

On to step 6:
When dividing 526 by 243, we get 2 with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 2192.0
Subtracting 486 from 526 leaves us with 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 243

Step 7:
243 can be fit into 400 1 times, resulting in a remainder of 157.
Put 1 as the next digit of the answer. 
Result so far: 21921.0
Subtracting 243 from 400 leaves us with 157.
Grab the next digit (8) from the dividend, add it to 157, then carry on: 1578 / 243

On to step 8:
243 can be fit into 1578 6 times, resulting in a remainder of 120.
The next digit of our result is 6. 
Result so far: 219216.0
The remainder is 120 after subtracting 1458 from 1578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 9:
If we divide 1200 by 243, we get 4 and a remainder of 228.
The next digit of our result is 4. 
Result so far: 219216.4
Subtract 972 from 1200 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 10:
2280 divided by 243 is 9 with a remainder of 93.
Write down 9 as next digit of the result. 
Result so far: 219216.49
Subtract 2187 from 2280 to get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Let's proceed to step 11:
930 divided by 243 is 3 with a remainder of 201.
Write down 3 as next digit of the result. 
Result so far: 219216.493
Subtracting 729 from 930 leaves us with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 12:
2010 divided by 243 is 8 with a remainder of 66.
Write down 8 as next digit of the result. 
Result so far: 219216.4938
If we subtract 1944 from 2010, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 13:
660 divided by 243 is 2 with a remainder of 174.
Record the quotient 2 as the next digit in the result. 
Result so far: 219216.49382
If we take 486 away from 660, we end up with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Let's proceed to step 14:
243 can be fit into 1740 7 times, resulting in a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 219216.493827
The remainder is 39 after subtracting 1701 from 1740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 15:
If we divide 390 by 243, we get 1 and a remainder of 147.
The number 1 becomes the next digit in our result. 
Result so far: 219216.4938271
The remainder is 147 after subtracting 243 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Moving on to step 16:
243 can be fit into 1470 6 times, resulting in a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 219216.49382716
Subtract 1458 from 1470 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 219216.49382716 and a remainder of 1.2e-08.