We look at the division of 14040323 by 621 
The aim is to understand the frequency of 621 in 14040323.

Going ahead to step 1:
The number 621 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 621

Let's proceed to step 2:
621 goes into 14 0 times with a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 14, we end up with 14.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 621

On to step 3:
621 can be fit into 140 0 times, resulting in a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 140 leaves us with 140.
Fetch the next digit (4) from the dividend, attach it to 140 and continue: 1404 / 621

Moving on to step 4:
The number 621 fits into 1404 2 times, leaving a remainder of 162.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 162 after subtracting 1242 from 1404.
Take the next digit (0) from the dividend and append it to 162, then repeat: 1620 / 621

Going ahead to step 5:
621 can be fit into 1620 2 times, resulting in a remainder of 378.
Use 2 as the next digit of our solution. 
Result so far: 22.0
The remainder is 378 after subtracting 1242 from 1620.
Bring next digit (3) of the dividend behind the 378 and repeat the process: 3783 / 621

Let's proceed to step 6:
3783 divided by 621 is 6 with a remainder of 57.
Record the quotient 6 as the next digit in the result. 
Result so far: 226.0
Deduct 3726 from 3783 and we're left with 57.
Include the next digit (2) from the dividend after 57, then repeat: 572 / 621

Step 7:
If we divide 572 by 621, we get 0 and a remainder of 572.
The next digit of our result is 0. 
Result so far: 2260.0
The remainder is 572 after subtracting 0 from 572.
Include the next digit (3) from the dividend after 572, then repeat: 5723 / 621

Let's proceed to step 8:
If we divide 5723 by 621, we get 9 and a remainder of 134.
The number 9 becomes the next digit in our result. 
Result so far: 22609.0
Subtracting 5589 from 5723 leaves us with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Let's proceed to step 9:
The number 621 fits into 1340 2 times, leaving a remainder of 98.
Use 2 as the next digit of our solution. 
Result so far: 22609.2
The remainder is 98 after subtracting 1242 from 1340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Going ahead to step 10:
980 divided by 621 is 1 with a remainder of 359.
The number 1 becomes the next digit in our result. 
Result so far: 22609.21
Subtracting 621 from 980 leaves us with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

Step 11:
3590 divided by 621 is 5 with a remainder of 485.
Put 5 as the next digit of the answer. 
Result so far: 22609.215
Subtract 3105 from 3590 to get 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Step 12:
621 goes into 4850 7 times with a remainder of 503.
Record the quotient 7 as the next digit in the result. 
Result so far: 22609.2157
The remainder is 503 after subtracting 4347 from 4850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

On to step 13:
5030 divided by 621 is 8 with a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 22609.21578
If we subtract 4968 from 5030, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 14:
When dividing 620 by 621, we get 0 with a remainder of 620.
Record the quotient 0 as the next digit in the result. 
Result so far: 22609.21578
Subtracting 0 from 620 leaves us with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Going ahead to step 15:
6200 divided by 621 is 9 with a remainder of 611.
Record the quotient 9 as the next digit in the result. 
Result so far: 22609.2157809
Deduct 5589 from 6200 and we're left with 611.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

Step 16:
If we divide 6110 by 621, we get 9 and a remainder of 521.
The next digit of our result is 9. 
Result so far: 22609.21578099
If we take 5589 away from 6110, we end up with 521.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5210, and continue the process.

The final outcome is 22609.21578099, with a leftover of 5.21e-07.