20572339 ÷ 580 
The aim is to understand the frequency of 580 in 20572339.

Advancing to step 1:
If we divide 2 by 580, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 580

Going ahead to step 2:
The number 580 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Take the next digit (5) from the dividend and append it to 20, then repeat: 205 / 580

Step 3:
205 divided by 580 is 0 with a remainder of 205.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 205 to get 205.
Bring next digit (7) of the dividend behind the 205 and repeat the process: 2057 / 580

Let's proceed to step 4:
580 goes into 2057 3 times with a remainder of 317.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 1740 from 2057 leaves us with 317.
Append the next digit (2) from the dividend to 317 and continue with: 3172 / 580

Going ahead to step 5:
580 goes into 3172 5 times with a remainder of 272.
The next digit of our result is 5. 
Result so far: 35.0
Subtracting 2900 from 3172 leaves us with 272.
Bring next digit (3) of the dividend behind the 272 and repeat the process: 2723 / 580

Step 6:
580 can be fit into 2723 4 times, resulting in a remainder of 403.
Write down 4 as next digit of the result. 
Result so far: 354.0
Subtract 2320 from 2723 to get 403.
Append the next digit (3) from the dividend to 403 and continue with: 4033 / 580

Going ahead to step 7:
If we divide 4033 by 580, we get 6 and a remainder of 553.
The number 6 becomes the next digit in our result. 
Result so far: 3546.0
If we subtract 3480 from 4033, we get 553.
Take the next digit (9) from the dividend and append it to 553, then repeat: 5539 / 580

On to step 8:
580 goes into 5539 9 times with a remainder of 319.
The next digit of our result is 9. 
Result so far: 35469.0
The remainder is 319 after subtracting 5220 from 5539.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

Moving on to step 9:
3190 divided by 580 is 5 with a remainder of 290.
Write down 5 as next digit of the result. 
Result so far: 35469.5
If we take 2900 away from 3190, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Advancing to step 10:
When dividing 2900 by 580, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 35469.55
Subtract 2900 from 2900 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 35469.55 with a remainder of 0.0.