We look at the division of 18685648 by 287 
The aim is to understand the frequency of 287 in 18685648.

Advancing to step 1:
When dividing 1 by 287, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 287

Advancing to step 2:
287 goes into 18 0 times with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 287

Advancing to step 3:
If we divide 186 by 287, we get 0 and a remainder of 186.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 186, we end up with 186.
Append the next digit (8) from the dividend to 186 and continue with: 1868 / 287

Step 4:
The number 287 fits into 1868 6 times, leaving a remainder of 146.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 1722 from 1868, we get 146.
Include the next digit (5) from the dividend after 146, then repeat: 1465 / 287

Going ahead to step 5:
When dividing 1465 by 287, we get 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 65.0
If we take 1435 away from 1465, we end up with 30.
Append the next digit (6) from the dividend to 30 and continue with: 306 / 287

Advancing to step 6:
287 goes into 306 1 times with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 651.0
If we subtract 287 from 306, we get 19.
Bring next digit (4) of the dividend behind the 19 and repeat the process: 194 / 287

On to step 7:
287 can be fit into 194 0 times, resulting in a remainder of 194.
Record the quotient 0 as the next digit in the result. 
Result so far: 6510.0
Subtracting 0 from 194 leaves us with 194.
Fetch the next digit (8) from the dividend, attach it to 194 and continue: 1948 / 287

On to step 8:
287 goes into 1948 6 times with a remainder of 226.
Record the quotient 6 as the next digit in the result. 
Result so far: 65106.0
Deduct 1722 from 1948 and we're left 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.

Step 9:
The number 287 fits into 2260 7 times, leaving a remainder of 251.
Write down 7 as next digit of the result. 
Result so far: 65106.7
Subtract 2009 from 2260 to get 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

On to step 10:
287 goes into 2510 8 times with a remainder of 214.
Use 8 as the next digit of our solution. 
Result so far: 65106.78
Deduct 2296 from 2510 and we're left with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Going ahead to step 11:
When dividing 2140 by 287, we get 7 with a remainder of 131.
The number 7 becomes the next digit in our result. 
Result so far: 65106.787
Deduct 2009 from 2140 and we're left with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Going ahead to step 12:
287 can be fit into 1310 4 times, resulting in a remainder of 162.
The number 4 becomes the next digit in our result. 
Result so far: 65106.7874
The remainder is 162 after subtracting 1148 from 1310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Let's proceed to step 13:
287 goes into 1620 5 times with a remainder of 185.
Write down 5 as next digit of the result. 
Result so far: 65106.78745
Subtract 1435 from 1620 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

On to step 14:
287 can be fit into 1850 6 times, resulting in a remainder of 128.
The number 6 becomes the next digit in our result. 
Result so far: 65106.787456
If we subtract 1722 from 1850, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 15:
If we divide 1280 by 287, we get 4 and a remainder of 132.
The next digit of our result is 4. 
Result so far: 65106.7874564
Subtract 1148 from 1280 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Step 16:
The number 287 fits into 1320 4 times, leaving a remainder of 172.
Record the quotient 4 as the next digit in the result. 
Result so far: 65106.78745644
If we take 1148 away from 1320, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

The final result is 65106.78745644 with a remainder of 1.72e-07.