We look at the division of 13581338 by 281 
The aim is to understand the frequency of 281 in 13581338.

On to step 1:
The number 281 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 281

Let's proceed to step 2:
13 divided by 281 is 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 281

On to step 3:
If we divide 135 by 281, we get 0 and a remainder of 135.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 135 leaves us with 135.
Take the next digit (8) from the dividend and append it to 135, then repeat: 1358 / 281

On to step 4:
If we divide 1358 by 281, we get 4 and a remainder of 234.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 1124 from 1358 and we're left with 234.
Take the next digit (1) from the dividend and append it to 234, then repeat: 2341 / 281

Advancing to step 5:
When dividing 2341 by 281, we get 8 with a remainder of 93.
Put 8 as the next digit of the answer. 
Result so far: 48.0
Subtracting 2248 from 2341 leaves us with 93.
Grab the next digit (3) from the dividend, add it to 93, then carry on: 933 / 281

Let's proceed to step 6:
When dividing 933 by 281, we get 3 with a remainder of 90.
Use 3 as the next digit of our solution. 
Result so far: 483.0
Deduct 843 from 933 and we're left with 90.
Append the next digit (3) from the dividend to 90 and continue with: 903 / 281

Let's proceed to step 7:
281 can be fit into 903 3 times, resulting in a remainder of 60.
The number 3 becomes the next digit in our result. 
Result so far: 4833.0
If we take 843 away from 903, we end up with 60.
Bring next digit (8) of the dividend behind the 60 and repeat the process: 608 / 281

Let's proceed to step 8:
608 divided by 281 is 2 with a remainder of 46.
The number 2 becomes the next digit in our result. 
Result so far: 48332.0
Deduct 562 from 608 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 9:
If we divide 460 by 281, we get 1 and a remainder of 179.
Write down 1 as next digit of the result. 
Result so far: 48332.1
Deduct 281 from 460 and we're left with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Let's proceed to step 10:
If we divide 1790 by 281, we get 6 and a remainder of 104.
Record the quotient 6 as the next digit in the result. 
Result so far: 48332.16
Subtracting 1686 from 1790 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Going ahead to step 11:
1040 divided by 281 is 3 with a remainder of 197.
Write down 3 as next digit of the result. 
Result so far: 48332.163
If we subtract 843 from 1040, we get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Step 12:
281 can be fit into 1970 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 48332.1637
Subtracting 1967 from 1970 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 13:
When dividing 30 by 281, we get 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 48332.1637
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 14:
281 goes into 300 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 48332.163701
If we subtract 281 from 300, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 15:
281 goes into 190 0 times with a remainder of 190.
Record the quotient 0 as the next digit in the result. 
Result so far: 48332.163701
The remainder is 190 after subtracting 0 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 16:
281 can be fit into 1900 6 times, resulting in a remainder of 214.
The number 6 becomes the next digit in our result. 
Result so far: 48332.16370106
The remainder is 214 after subtracting 1686 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

The final outcome is 48332.16370106, with a leftover of 2.14e-07.