We're dividing 551325 by 13 
The aim is to understand the frequency of 13 in 551325.

Advancing to step 1:
5 divided by 13 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 13

Let's proceed to step 2:
The number 13 fits into 55 4 times, leaving a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 52 away from 55, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 13

Let's proceed to step 3:
13 can be fit into 31 2 times, resulting in a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we subtract 26 from 31, we get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 13

Going ahead to step 4:
If we divide 53 by 13, we get 4 and a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 424.0
Subtracting 52 from 53 leaves us with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 13

On to step 5:
If we divide 12 by 13, we get 0 and a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 4240.0
The remainder is 12 after subtracting 0 from 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 13

Advancing to step 6:
13 goes into 125 9 times with a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 42409.0
If we subtract 117 from 125, 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.

Moving on to step 7:
13 can be fit into 80 6 times, resulting in a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 42409.6
If we subtract 78 from 80, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
13 goes into 20 1 times with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 42409.61
Subtract 13 from 20 to 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.

Step 9:
When dividing 70 by 13, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 42409.615
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.

Going ahead to step 10:
When dividing 50 by 13, we get 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 42409.6153
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.

Advancing to step 11:
110 divided by 13 is 8 with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 42409.61538
If we take 104 away from 110, we end up 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.

Moving on to step 12:
If we divide 60 by 13, we get 4 and a remainder of 8.
The next digit of our result is 4. 
Result so far: 42409.615384
Subtract 52 from 60 to 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.

Going ahead to step 13:
When dividing 80 by 13, we get 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 42409.6153846
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.

Let's proceed to step 14:
20 divided by 13 is 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 42409.61538461
The remainder is 7 after subtracting 13 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 42409.61538461 and a remainder of 7e-09.