We look at the division of 744570 by 13 
The aim is to understand the frequency of 13 in 744570.

Going ahead to step 1:
The number 13 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 13

Step 2:
74 divided by 13 is 5 with a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 65 from 74 leaves us with 9.
Append the next digit (4) from the dividend to 9 and continue with: 94 / 13

Going ahead to step 3:
13 goes into 94 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 57.0
If we take 91 away from 94, we end up with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 13

Step 4:
13 can be fit into 35 2 times, resulting in a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 572.0
If we subtract 26 from 35, we get 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 13

Step 5:
13 can be fit into 97 7 times, resulting in a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 5727.0
The remainder is 6 after subtracting 91 from 97.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 13

Moving on to step 6:
60 divided by 13 is 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 57274.0
The remainder is 8 after subtracting 52 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
13 can be fit into 80 6 times, resulting in a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 57274.6
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
13 can be fit into 20 1 times, resulting in a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 57274.61
Subtracting 13 from 20 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 9:
70 divided by 13 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 57274.615
The remainder is 5 after subtracting 65 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
When dividing 50 by 13, we get 3 with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 57274.6153
Subtract 39 from 50 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
13 can be fit into 110 8 times, resulting in a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 57274.61538
The remainder is 6 after subtracting 104 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 12:
When dividing 60 by 13, we get 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 57274.615384
The remainder is 8 after subtracting 52 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
80 divided by 13 is 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 57274.6153846
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
When dividing 20 by 13, we get 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 57274.61538461
If we take 13 away from 20, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 57274.61538461 with a remaining 7e-09.