Let's divide 21536521 by 545
The aim is to understand the frequency of 545 in 21536521.

Moving on to step 1:
545 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 545

On to step 2:
If we divide 21 by 545, we get 0 and a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 545

Moving on to step 3:
When dividing 215 by 545, we get 0 with a remainder of 215.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 215 after subtracting 0 from 215.
Bring next digit (3) of the dividend behind the 215 and repeat the process: 2153 / 545

Advancing to step 4:
If we divide 2153 by 545, we get 3 and a remainder of 518.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 1635 from 2153, we get 518.
Fetch the next digit (6) from the dividend, attach it to 518 and continue: 5186 / 545

Let's proceed to step 5:
5186 divided by 545 is 9 with a remainder of 281.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Subtracting 4905 from 5186 leaves us with 281.
Include the next digit (5) from the dividend after 281, then repeat: 2815 / 545

Advancing to step 6:
545 can be fit into 2815 5 times, resulting in a remainder of 90.
Write down 5 as next digit of the result. 
Result so far: 395.0
If we subtract 2725 from 2815, we get 90.
Grab the next digit (2) from the dividend, add it to 90, then carry on: 902 / 545

Going ahead to step 7:
545 goes into 902 1 times with a remainder of 357.
Use 1 as the next digit of our solution. 
Result so far: 3951.0
Deduct 545 from 902 and we're left with 357.
Grab the next digit (1) from the dividend, add it to 357, then carry on: 3571 / 545

Let's proceed to step 8:
545 goes into 3571 6 times with a remainder of 301.
Put 6 as the next digit of the answer. 
Result so far: 39516.0
Subtracting 3270 from 3571 leaves us with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Step 9:
545 goes into 3010 5 times with a remainder of 285.
Write down 5 as next digit of the result. 
Result so far: 39516.5
If we subtract 2725 from 3010, we get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Going ahead to step 10:
545 can be fit into 2850 5 times, resulting in a remainder of 125.
Write down 5 as next digit of the result. 
Result so far: 39516.55
If we subtract 2725 from 2850, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

In conclusion, the division gives 39516.55 with a balance of 0.125.