Let's divide 202621 by 13
The aim is to understand the frequency of 13 in 202621.

Moving on to step 1:
2 divided by 13 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 13

Moving on to step 2:
When dividing 20 by 13, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
If we take 13 away from 20, we end up with 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 13

On to step 3:
13 can be fit into 72 5 times, resulting in a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 65 from 72 and we're left with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 13

Step 4:
76 divided by 13 is 5 with a remainder of 11.
The next digit of our result is 5. 
Result so far: 155.0
The remainder is 11 after subtracting 65 from 76.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 13

Moving on to step 5:
When dividing 112 by 13, we get 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 1558.0
Deduct 104 from 112 and we're left with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 13

Step 6:
The number 13 fits into 81 6 times, leaving a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 15586.0
The remainder is 3 after subtracting 78 from 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
When dividing 30 by 13, we get 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 15586.2
If we take 26 away from 30, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
13 can be fit into 40 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 15586.23
Subtracting 39 from 40 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
The number 13 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 15586.23
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
100 divided by 13 is 7 with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 15586.2307
Deduct 91 from 100 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 11:
90 divided by 13 is 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 15586.23076
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
If we divide 120 by 13, we get 9 and a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 15586.230769
The remainder is 3 after subtracting 117 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 13:
30 divided by 13 is 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 15586.2307692
The remainder is 4 after subtracting 26 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
13 goes into 40 3 times with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 15586.23076923
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 15586.23076923, with a leftover of 1e-09.