We look at the division of 42573868 by 259 
The aim is to understand the frequency of 259 in 42573868.

Let's proceed to step 1:
The number 259 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 259

Going ahead to step 2:
If we divide 42 by 259, we get 0 and a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Take the next digit (5) from the dividend and append it to 42, then repeat: 425 / 259

Going ahead to step 3:
If we divide 425 by 259, we get 1 and a remainder of 166.
The next digit of our result is 1. 
Result so far: 1.0
If we take 259 away from 425, we end up with 166.
Bring next digit (7) of the dividend behind the 166 and repeat the process: 1667 / 259

On to step 4:
259 goes into 1667 6 times with a remainder of 113.
The next digit of our result is 6. 
Result so far: 16.0
Subtracting 1554 from 1667 leaves us with 113.
Append the next digit (3) from the dividend to 113 and continue with: 1133 / 259

Moving on to step 5:
259 goes into 1133 4 times with a remainder of 97.
Put 4 as the next digit of the answer. 
Result so far: 164.0
Subtracting 1036 from 1133 leaves us with 97.
Include the next digit (8) from the dividend after 97, then repeat: 978 / 259

Let's proceed to step 6:
259 goes into 978 3 times with a remainder of 201.
The next digit of our result is 3. 
Result so far: 1643.0
Deduct 777 from 978 and we're left with 201.
Bring next digit (6) of the dividend behind the 201 and repeat the process: 2016 / 259

Step 7:
The number 259 fits into 2016 7 times, leaving a remainder of 203.
Put 7 as the next digit of the answer. 
Result so far: 16437.0
If we subtract 1813 from 2016, we get 203.
Bring next digit (8) of the dividend behind the 203 and repeat the process: 2038 / 259

On to step 8:
259 can be fit into 2038 7 times, resulting in a remainder of 225.
Write down 7 as next digit of the result. 
Result so far: 164377.0
Subtract 1813 from 2038 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Advancing to step 9:
2250 divided by 259 is 8 with a remainder of 178.
Put 8 as the next digit of the answer. 
Result so far: 164377.8
The remainder is 178 after subtracting 2072 from 2250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Let's proceed to step 10:
259 goes into 1780 6 times with a remainder of 226.
The number 6 becomes the next digit in our result. 
Result so far: 164377.86
The remainder is 226 after subtracting 1554 from 1780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Moving on to step 11:
When dividing 2260 by 259, we get 8 with a remainder of 188.
The number 8 becomes the next digit in our result. 
Result so far: 164377.868
Deduct 2072 from 2260 and we're left with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 12:
259 goes into 1880 7 times with a remainder of 67.
Record the quotient 7 as the next digit in the result. 
Result so far: 164377.8687
The remainder is 67 after subtracting 1813 from 1880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 13:
670 divided by 259 is 2 with a remainder of 152.
Write down 2 as next digit of the result. 
Result so far: 164377.86872
If we take 518 away from 670, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Let's proceed to step 14:
259 goes into 1520 5 times with a remainder of 225.
The next digit of our result is 5. 
Result so far: 164377.868725
If we subtract 1295 from 1520, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Advancing to step 15:
2250 divided by 259 is 8 with a remainder of 178.
Record the quotient 8 as the next digit in the result. 
Result so far: 164377.8687258
Deduct 2072 from 2250 and we're left with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Advancing to step 16:
The number 259 fits into 1780 6 times, leaving a remainder of 226.
The next digit of our result is 6. 
Result so far: 164377.86872586
Subtracting 1554 from 1780 leaves us with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

After the division, we end up with 164377.86872586 and a remainder of 2.26e-07.