We look at the division of 779898 by 13 
The aim is to understand the frequency of 13 in 779898.

Let's proceed to step 1:
7 divided by 13 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 13

Step 2:
13 goes into 77 5 times with a remainder of 12.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 65 from 77, we get 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 13

Advancing to step 3:
13 goes into 129 9 times with a remainder of 12.
The next digit of our result is 9. 
Result so far: 59.0
Subtracting 117 from 129 leaves us with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 13

Going ahead to step 4:
When dividing 128 by 13, we get 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 599.0
If we subtract 117 from 128, we get 11.
Include the next digit (9) from the dividend after 11, then repeat: 119 / 13

Going ahead to step 5:
If we divide 119 by 13, we get 9 and a remainder of 2.
The next digit of our result is 9. 
Result so far: 5999.0
Subtract 117 from 119 to get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 13

Moving on to step 6:
When dividing 28 by 13, we get 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 59992.0
Deduct 26 from 28 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.

Moving on to step 7:
The number 13 fits into 20 1 times, leaving a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 59992.1
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.

Let's proceed to step 8:
70 divided by 13 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 59992.15
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.

Step 9:
The number 13 fits into 50 3 times, leaving a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 59992.153
If we subtract 39 from 50, we 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.

On to step 10:
The number 13 fits into 110 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 59992.1538
Subtracting 104 from 110 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 11:
If we divide 60 by 13, we get 4 and a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 59992.15384
If we subtract 52 from 60, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
13 goes into 80 6 times with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 59992.153846
Subtracting 78 from 80 leaves us 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.

Step 13:
20 divided by 13 is 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 59992.1538461
If we subtract 13 from 20, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 14:
If we divide 70 by 13, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 59992.15384615
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.

The final result is 59992.15384615 with a remainder of 5e-09.