Let's divide 21207128 by 588
The aim is to understand the frequency of 588 in 21207128.

Moving on to step 1:
If we divide 2 by 588, 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.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 588

Let's proceed to step 2:
The number 588 fits into 21 0 times, leaving a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 588

Advancing to step 3:
588 can be fit into 212 0 times, resulting in a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Fetch the next digit (0) from the dividend, attach it to 212 and continue: 2120 / 588

Step 4:
If we divide 2120 by 588, we get 3 and a remainder of 356.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 356 after subtracting 1764 from 2120.
Fetch the next digit (7) from the dividend, attach it to 356 and continue: 3567 / 588

Going ahead to step 5:
If we divide 3567 by 588, we get 6 and a remainder of 39.
The number 6 becomes the next digit in our result. 
Result so far: 36.0
The remainder is 39 after subtracting 3528 from 3567.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 588

On to step 6:
588 goes into 391 0 times with a remainder of 391.
Put 0 as the next digit of the answer. 
Result so far: 360.0
If we take 0 away from 391, we end up with 391.
Include the next digit (2) from the dividend after 391, then repeat: 3912 / 588

Let's proceed to step 7:
When dividing 3912 by 588, we get 6 with a remainder of 384.
The next digit of our result is 6. 
Result so far: 3606.0
Subtracting 3528 from 3912 leaves us with 384.
Include the next digit (8) from the dividend after 384, then repeat: 3848 / 588

Moving on to step 8:
588 goes into 3848 6 times with a remainder of 320.
The number 6 becomes the next digit in our result. 
Result so far: 36066.0
Subtract 3528 from 3848 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 9:
3200 divided by 588 is 5 with a remainder of 260.
The number 5 becomes the next digit in our result. 
Result so far: 36066.5
Subtract 2940 from 3200 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 10:
When dividing 2600 by 588, we get 4 with a remainder of 248.
Put 4 as the next digit of the answer. 
Result so far: 36066.54
Deduct 2352 from 2600 and we're left with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Moving on to step 11:
588 goes into 2480 4 times with a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 36066.544
Deduct 2352 from 2480 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The final result is 36066.544 with a remainder of 0.0128.