We divide 568021 by 13
The aim is to understand the frequency of 13 in 568021.

On to step 1:
The number 13 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 13

On to step 2:
The number 13 fits into 56 4 times, leaving a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 52 away from 56, we end up with 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 13

Step 3:
13 can be fit into 48 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 43.0
If we subtract 39 from 48, we get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 13

Advancing to step 4:
13 can be fit into 90 6 times, resulting in a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 436.0
If we take 78 away from 90, we end up with 12.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 13

Moving on to step 5:
13 can be fit into 122 9 times, resulting in a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 4369.0
Subtracting 117 from 122 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 13

Going ahead to step 6:
51 divided by 13 is 3 with a remainder of 12.
The next digit of our result is 3. 
Result so far: 43693.0
If we take 39 away from 51, we end up 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.

Going ahead to step 7:
When dividing 120 by 13, we get 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 43693.9
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
13 goes into 30 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 43693.92
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.

Going ahead to step 9:
13 goes into 40 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 43693.923
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.

Advancing to step 10:
13 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 43693.923
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
13 can be fit into 100 7 times, resulting in a remainder of 9.
The next digit of our result is 7. 
Result so far: 43693.92307
If we subtract 91 from 100, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 12:
13 goes into 90 6 times with a remainder of 12.
The next digit of our result is 6. 
Result so far: 43693.923076
Subtracting 78 from 90 leaves us 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.

Step 13:
13 can be fit into 120 9 times, resulting in a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 43693.9230769
Subtract 117 from 120 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
When dividing 30 by 13, we get 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 43693.92307692
Subtracting 26 from 30 leaves us 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.

The final outcome is 43693.92307692, with a leftover of 4e-09.