We're dividing 974143 by 13 
The aim is to understand the frequency of 13 in 974143.

Advancing to step 1:
The number 13 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 13

Advancing to step 2:
13 can be fit into 97 7 times, resulting in a remainder of 6.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 6 after subtracting 91 from 97.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 13

Moving on to step 3:
64 divided by 13 is 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 74.0
Subtract 52 from 64 to get 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 13

Advancing to step 4:
13 can be fit into 121 9 times, resulting in a remainder of 4.
Record the quotient 9 as the next digit in the result. 
Result so far: 749.0
Subtract 117 from 121 to get 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 13

Step 5:
If we divide 44 by 13, we get 3 and a remainder of 5.
The next digit of our result is 3. 
Result so far: 7493.0
Subtract 39 from 44 to get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 13

Let's proceed to step 6:
53 divided by 13 is 4 with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 74934.0
The remainder is 1 after subtracting 52 from 53.
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 7:
13 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 74934.0
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.

On to step 8:
13 goes into 100 7 times with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 74934.07
The remainder is 9 after subtracting 91 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 9:
If we divide 90 by 13, we get 6 and a remainder of 12.
The next digit of our result is 6. 
Result so far: 74934.076
If we take 78 away from 90, 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 10:
13 goes into 120 9 times with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 74934.0769
Subtracting 117 from 120 leaves us 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 11:
30 divided by 13 is 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 74934.07692
If we subtract 26 from 30, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 12:
When dividing 40 by 13, we get 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 74934.076923
If we subtract 39 from 40, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 13:
If we divide 10 by 13, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 74934.076923
Subtracting 0 from 10 leaves us 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.

Moving on to step 14:
13 goes into 100 7 times with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 74934.07692307
If we take 91 away from 100, we end up 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.

The final result is 74934.07692307 with a remainder of 9e-09.