Let's divide 21928424 by 660
The aim is to understand the frequency of 660 in 21928424.

Moving on to step 1:
If we divide 2 by 660, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 660

Step 2:
660 can be fit into 21 0 times, resulting in a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (9) from the dividend after 21, then repeat: 219 / 660

Going ahead to step 3:
660 can be fit into 219 0 times, resulting in a remainder of 219.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 219, we end up with 219.
Append the next digit (2) from the dividend to 219 and continue with: 2192 / 660

Going ahead to step 4:
660 can be fit into 2192 3 times, resulting in a remainder of 212.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 1980 from 2192 to get 212.
Bring next digit (8) of the dividend behind the 212 and repeat the process: 2128 / 660

Step 5:
If we divide 2128 by 660, we get 3 and a remainder of 148.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
Subtract 1980 from 2128 to get 148.
Bring next digit (4) of the dividend behind the 148 and repeat the process: 1484 / 660

On to step 6:
660 goes into 1484 2 times with a remainder of 164.
Put 2 as the next digit of the answer. 
Result so far: 332.0
If we take 1320 away from 1484, we end up with 164.
Take the next digit (2) from the dividend and append it to 164, then repeat: 1642 / 660

Moving on to step 7:
660 can be fit into 1642 2 times, resulting in a remainder of 322.
Record the quotient 2 as the next digit in the result. 
Result so far: 3322.0
Deduct 1320 from 1642 and we're left with 322.
Append the next digit (4) from the dividend to 322 and continue with: 3224 / 660

Step 8:
660 goes into 3224 4 times with a remainder of 584.
The next digit of our result is 4. 
Result so far: 33224.0
The remainder is 584 after subtracting 2640 from 3224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Advancing to step 9:
660 goes into 5840 8 times with a remainder of 560.
Record the quotient 8 as the next digit in the result. 
Result so far: 33224.8
If we take 5280 away from 5840, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 10:
The number 660 fits into 5600 8 times, leaving a remainder of 320.
Put 8 as the next digit of the answer. 
Result so far: 33224.88
Subtracting 5280 from 5600 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

The final outcome is 33224.88, with a leftover of 0.32.