We look at the division of 26201381 by 520 
The aim is to understand the frequency of 520 in 26201381.

Going ahead to step 1:
2 divided by 520 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 520

Advancing to step 2:
When dividing 26 by 520, we get 0 with a remainder of 26.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 26 to get 26.
Take the next digit (2) from the dividend and append it to 26, then repeat: 262 / 520

Let's proceed to step 3:
The number 520 fits into 262 0 times, leaving a remainder of 262.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 262 and we're left with 262.
Grab the next digit (0) from the dividend, add it to 262, then carry on: 2620 / 520

Advancing to step 4:
If we divide 2620 by 520, we get 5 and a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtract 2600 from 2620 to get 20.
Include the next digit (1) from the dividend after 20, then repeat: 201 / 520

Let's proceed to step 5:
If we divide 201 by 520, we get 0 and a remainder of 201.
Record the quotient 0 as the next digit in the result. 
Result so far: 50.0
If we take 0 away from 201, we end up with 201.
Bring next digit (3) of the dividend behind the 201 and repeat the process: 2013 / 520

Moving on to step 6:
When dividing 2013 by 520, we get 3 with a remainder of 453.
Write down 3 as next digit of the result. 
Result so far: 503.0
Subtracting 1560 from 2013 leaves us with 453.
Fetch the next digit (8) from the dividend, attach it to 453 and continue: 4538 / 520

Let's proceed to step 7:
When dividing 4538 by 520, we get 8 with a remainder of 378.
Use 8 as the next digit of our solution. 
Result so far: 5038.0
If we take 4160 away from 4538, we end up with 378.
Bring next digit (1) of the dividend behind the 378 and repeat the process: 3781 / 520

Going ahead to step 8:
If we divide 3781 by 520, we get 7 and a remainder of 141.
The next digit of our result is 7. 
Result so far: 50387.0
Subtracting 3640 from 3781 leaves us with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Advancing to step 9:
1410 divided by 520 is 2 with a remainder of 370.
Write down 2 as next digit of the result. 
Result so far: 50387.2
Subtracting 1040 from 1410 leaves us with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 10:
520 goes into 3700 7 times with a remainder of 60.
The next digit of our result is 7. 
Result so far: 50387.27
The remainder is 60 after subtracting 3640 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 11:
If we divide 600 by 520, we get 1 and a remainder of 80.
Record the quotient 1 as the next digit in the result. 
Result so far: 50387.271
If we subtract 520 from 600, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 12:
520 can be fit into 800 1 times, resulting in a remainder of 280.
The next digit of our result is 1. 
Result so far: 50387.2711
If we take 520 away from 800, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

The quotient of the division is 50387.2711, and the remainder is 0.0028.