19578 divided by 13 
The aim is to understand the frequency of 13 in 19578.

Step 1:
1 divided by 13 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 13

Advancing to step 2:
When dividing 19 by 13, we get 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 6 after subtracting 13 from 19.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 13

Going ahead to step 3:
13 can be fit into 65 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 65 from 65 and we're left with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 13

Going ahead to step 4:
When dividing 7 by 13, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 150.0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 13

Going ahead to step 5:
13 goes into 78 6 times with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 1506.0
Subtracting 78 from 78 leaves us 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.

Advancing to step 6:
If we divide 0 by 13, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1506.0
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.

On to step 7:
When dividing 0 by 13, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1506.0
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.

Our division results in 1506.0 with a remaining 0.0.