21412839 ÷ 555 
The aim is to understand the frequency of 555 in 21412839.

Moving on to step 1:
555 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 555

Advancing to step 2:
When dividing 21 by 555, we get 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 555

Let's proceed to step 3:
555 goes into 214 0 times with a remainder of 214.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 214, we get 214.
Fetch the next digit (1) from the dividend, attach it to 214 and continue: 2141 / 555

Moving on to step 4:
555 goes into 2141 3 times with a remainder of 476.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 1665 from 2141 leaves us with 476.
Grab the next digit (2) from the dividend, add it to 476, then carry on: 4762 / 555

Advancing to step 5:
4762 divided by 555 is 8 with a remainder of 322.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtracting 4440 from 4762 leaves us with 322.
Append the next digit (8) from the dividend to 322 and continue with: 3228 / 555

Advancing to step 6:
When dividing 3228 by 555, we get 5 with a remainder of 453.
Put 5 as the next digit of the answer. 
Result so far: 385.0
If we take 2775 away from 3228, we end up with 453.
Grab the next digit (3) from the dividend, add it to 453, then carry on: 4533 / 555

On to step 7:
555 goes into 4533 8 times with a remainder of 93.
Record the quotient 8 as the next digit in the result. 
Result so far: 3858.0
Subtracting 4440 from 4533 leaves us with 93.
Append the next digit (9) from the dividend to 93 and continue with: 939 / 555

Step 8:
When dividing 939 by 555, we get 1 with a remainder of 384.
Use 1 as the next digit of our solution. 
Result so far: 38581.0
If we take 555 away from 939, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Let's proceed to step 9:
555 can be fit into 3840 6 times, resulting in a remainder of 510.
Use 6 as the next digit of our solution. 
Result so far: 38581.6
The remainder is 510 after subtracting 3330 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Let's proceed to step 10:
When dividing 5100 by 555, we get 9 with a remainder of 105.
Put 9 as the next digit of the answer. 
Result so far: 38581.69
The remainder is 105 after subtracting 4995 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Moving on to step 11:
555 can be fit into 1050 1 times, resulting in a remainder of 495.
Record the quotient 1 as the next digit in the result. 
Result so far: 38581.691
Subtract 555 from 1050 to get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Let's proceed to step 12:
If we divide 4950 by 555, we get 8 and a remainder of 510.
Use 8 as the next digit of our solution. 
Result so far: 38581.6918
Deduct 4440 from 4950 and we're left with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 13:
555 goes into 5100 9 times with a remainder of 105.
The number 9 becomes the next digit in our result. 
Result so far: 38581.69189
If we take 4995 away from 5100, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

On to step 14:
When dividing 1050 by 555, we get 1 with a remainder of 495.
The number 1 becomes the next digit in our result. 
Result so far: 38581.691891
If we take 555 away from 1050, we end up with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Advancing to step 15:
When dividing 4950 by 555, we get 8 with a remainder of 510.
Put 8 as the next digit of the answer. 
Result so far: 38581.6918918
The remainder is 510 after subtracting 4440 from 4950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Step 16:
5100 divided by 555 is 9 with a remainder of 105.
Write down 9 as next digit of the result. 
Result so far: 38581.69189189
If we subtract 4995 from 5100, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

After the division, we end up with 38581.69189189 and a remainder of 1.05e-07.