We're dividing 16517987 by 259 
The aim is to understand the frequency of 259 in 16517987.

Advancing to step 1:
When dividing 1 by 259, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 259

Moving on to step 2:
The number 259 fits into 16 0 times, leaving a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Append the next digit (5) from the dividend to 16 and continue with: 165 / 259

Step 3:
The number 259 fits into 165 0 times, leaving a remainder of 165.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 165, we end up with 165.
Append the next digit (1) from the dividend to 165 and continue with: 1651 / 259

Step 4:
259 can be fit into 1651 6 times, resulting in a remainder of 97.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 1554 from 1651 to get 97.
Include the next digit (7) from the dividend after 97, then repeat: 977 / 259

Step 5:
977 divided by 259 is 3 with a remainder of 200.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
If we subtract 777 from 977, we get 200.
Grab the next digit (9) from the dividend, add it to 200, then carry on: 2009 / 259

Let's proceed to step 6:
When dividing 2009 by 259, we get 7 with a remainder of 196.
The next digit of our result is 7. 
Result so far: 637.0
If we take 1813 away from 2009, we end up with 196.
Bring next digit (8) of the dividend behind the 196 and repeat the process: 1968 / 259

Let's proceed to step 7:
1968 divided by 259 is 7 with a remainder of 155.
Record the quotient 7 as the next digit in the result. 
Result so far: 6377.0
Subtracting 1813 from 1968 leaves us with 155.
Append the next digit (7) from the dividend to 155 and continue with: 1557 / 259

Let's proceed to step 8:
When dividing 1557 by 259, we get 6 with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 63776.0
If we subtract 1554 from 1557, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
259 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 63776.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 10:
259 goes into 300 1 times with a remainder of 41.
The number 1 becomes the next digit in our result. 
Result so far: 63776.01
Subtracting 259 from 300 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 11:
When dividing 410 by 259, we get 1 with a remainder of 151.
The number 1 becomes the next digit in our result. 
Result so far: 63776.011
Subtracting 259 from 410 leaves us with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

The quotient of the division is 63776.011, and the remainder is 0.0151.