15852717 divided by 587 
The aim is to understand the frequency of 587 in 15852717.

On to step 1:
587 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 587

Advancing to step 2:
The number 587 fits into 15 0 times, leaving a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 587

Step 3:
587 can be fit into 158 0 times, resulting in a remainder of 158.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 158, we end up with 158.
Grab the next digit (5) from the dividend, add it to 158, then carry on: 1585 / 587

Let's proceed to step 4:
587 can be fit into 1585 2 times, resulting in a remainder of 411.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 1174 from 1585 and we're left with 411.
Take the next digit (2) from the dividend and append it to 411, then repeat: 4112 / 587

Going ahead to step 5:
The number 587 fits into 4112 7 times, leaving a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 27.0
The remainder is 3 after subtracting 4109 from 4112.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 587

Going ahead to step 6:
When dividing 37 by 587, we get 0 with a remainder of 37.
Put 0 as the next digit of the answer. 
Result so far: 270.0
Subtract 0 from 37 to get 37.
Fetch the next digit (1) from the dividend, attach it to 37 and continue: 371 / 587

Let's proceed to step 7:
371 divided by 587 is 0 with a remainder of 371.
Write down 0 as next digit of the result. 
Result so far: 2700.0
Subtract 0 from 371 to get 371.
Append the next digit (7) from the dividend to 371 and continue with: 3717 / 587

Moving on to step 8:
587 can be fit into 3717 6 times, resulting in a remainder of 195.
Write down 6 as next digit of the result. 
Result so far: 27006.0
If we subtract 3522 from 3717, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Let's proceed to step 9:
1950 divided by 587 is 3 with a remainder of 189.
Record the quotient 3 as the next digit in the result. 
Result so far: 27006.3
Deduct 1761 from 1950 and we're left with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Moving on to step 10:
587 goes into 1890 3 times with a remainder of 129.
Write down 3 as next digit of the result. 
Result so far: 27006.33
If we take 1761 away from 1890, we end up with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

The quotient of the division is 27006.33, and the remainder is 0.129.