We're dividing 78905489 by 13 
The aim is to understand the frequency of 13 in 78905489.

Moving on to step 1:
If we divide 7 by 13, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 13

Step 2:
When dividing 78 by 13, we get 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 78 from 78, we get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 13

Moving on to step 3:
13 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 60.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 13

Let's proceed to step 4:
13 goes into 90 6 times with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 606.0
Subtracting 78 from 90 leaves us with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 13

Going ahead to step 5:
If we divide 125 by 13, we get 9 and a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 6069.0
Deduct 117 from 125 and we're left with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 13

On to step 6:
13 goes into 84 6 times with a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 60696.0
If we take 78 away from 84, we end up with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 13

Moving on to step 7:
If we divide 68 by 13, we get 5 and a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 606965.0
If we subtract 65 from 68, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 13

Going ahead to step 8:
39 divided by 13 is 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 6069653.0
Deduct 39 from 39 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
The number 13 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6069653.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
13 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6069653.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 6069653.0 with a remainder of 0.0.