21567889 divided by 880 
The aim is to understand the frequency of 880 in 21567889.

Step 1:
880 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
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 / 880

On to step 2:
When dividing 21 by 880, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Take the next digit (5) from the dividend and append it to 21, then repeat: 215 / 880

On to step 3:
When dividing 215 by 880, we get 0 with a remainder of 215.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 215 to get 215.
Take the next digit (6) from the dividend and append it to 215, then repeat: 2156 / 880

On to step 4:
880 can be fit into 2156 2 times, resulting in a remainder of 396.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1760 from 2156 to get 396.
Append the next digit (7) from the dividend to 396 and continue with: 3967 / 880

Moving on to step 5:
If we divide 3967 by 880, we get 4 and a remainder of 447.
Use 4 as the next digit of our solution. 
Result so far: 24.0
If we take 3520 away from 3967, we end up with 447.
Bring next digit (8) of the dividend behind the 447 and repeat the process: 4478 / 880

Advancing to step 6:
When dividing 4478 by 880, we get 5 with a remainder of 78.
Write down 5 as next digit of the result. 
Result so far: 245.0
The remainder is 78 after subtracting 4400 from 4478.
Fetch the next digit (8) from the dividend, attach it to 78 and continue: 788 / 880

On to step 7:
788 divided by 880 is 0 with a remainder of 788.
The number 0 becomes the next digit in our result. 
Result so far: 2450.0
Subtract 0 from 788 to get 788.
Append the next digit (9) from the dividend to 788 and continue with: 7889 / 880

Moving on to step 8:
If we divide 7889 by 880, we get 8 and a remainder of 849.
The number 8 becomes the next digit in our result. 
Result so far: 24508.0
Subtracting 7040 from 7889 leaves us with 849.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8490, and continue the process.

Let's proceed to step 9:
8490 divided by 880 is 9 with a remainder of 570.
Write down 9 as next digit of the result. 
Result so far: 24508.9
Subtract 7920 from 8490 to get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Going ahead to step 10:
880 goes into 5700 6 times with a remainder of 420.
The number 6 becomes the next digit in our result. 
Result so far: 24508.96
If we take 5280 away from 5700, we end up with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Moving on to step 11:
880 can be fit into 4200 4 times, resulting in a remainder of 680.
Write down 4 as next digit of the result. 
Result so far: 24508.964
If we take 3520 away from 4200, we end up with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Step 12:
880 goes into 6800 7 times with a remainder of 640.
The number 7 becomes the next digit in our result. 
Result so far: 24508.9647
If we subtract 6160 from 6800, we get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Advancing to step 13:
880 goes into 6400 7 times with a remainder of 240.
Use 7 as the next digit of our solution. 
Result so far: 24508.96477
Subtract 6160 from 6400 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The final result is 24508.96477 with a remainder of 0.00024.