52506920 ÷ 13 
The aim is to understand the frequency of 13 in 52506920.

Step 1:
13 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 13

Advancing to step 2:
52 divided by 13 is 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 52 from 52 leaves us with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 13

On to step 3:
When dividing 5 by 13, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Subtract 0 from 5 to get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 13

Going ahead to step 4:
13 goes into 50 3 times with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 403.0
Subtract 39 from 50 to get 11.
Bring next digit (6) of the dividend behind the 11 and repeat the process: 116 / 13

Moving on to step 5:
116 divided by 13 is 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 4038.0
Subtracting 104 from 116 leaves us with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 13

Step 6:
The number 13 fits into 129 9 times, leaving a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 40389.0
If we subtract 117 from 129, we get 12.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 13

Moving on to step 7:
13 goes into 122 9 times with a remainder of 5.
The next digit of our result is 9. 
Result so far: 403899.0
The remainder is 5 after subtracting 117 from 122.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 13

Let's proceed to step 8:
When dividing 50 by 13, we get 3 with a remainder of 11.
The next digit of our result is 3. 
Result so far: 4038993.0
If we take 39 away from 50, we end up with 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 9:
13 can be fit into 110 8 times, resulting in a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 4038993.8
The remainder is 6 after subtracting 104 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 10:
The number 13 fits into 60 4 times, leaving a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 4038993.84
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.

Going ahead to step 11:
If we divide 80 by 13, we get 6 and a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 4038993.846
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.

Advancing to step 12:
The number 13 fits into 20 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 4038993.8461
Subtracting 13 from 20 leaves us 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.

Step 13:
13 goes into 70 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 4038993.84615
If we take 65 away from 70, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 14:
If we divide 50 by 13, we get 3 and a remainder of 11.
The next digit of our result is 3. 
Result so far: 4038993.846153
If we take 39 away from 50, we end up with 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 15:
13 goes into 110 8 times with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 4038993.8461538
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 16:
The number 13 fits into 60 4 times, leaving a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 4038993.84615384
Deduct 52 from 60 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 4038993.84615384 with a remainder of 8e-09.