We look at the division of 87182717 by 443 
The aim is to understand the frequency of 443 in 87182717.

On to step 1:
When dividing 8 by 443, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 443

Let's proceed to step 2:
87 divided by 443 is 0 with a remainder of 87.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Take the next digit (1) from the dividend and append it to 87, then repeat: 871 / 443

Step 3:
443 goes into 871 1 times with a remainder of 428.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 443 from 871 leaves us with 428.
Grab the next digit (8) from the dividend, add it to 428, then carry on: 4288 / 443

Step 4:
4288 divided by 443 is 9 with a remainder of 301.
Put 9 as the next digit of the answer. 
Result so far: 19.0
The remainder is 301 after subtracting 3987 from 4288.
Bring next digit (2) of the dividend behind the 301 and repeat the process: 3012 / 443

Going ahead to step 5:
443 can be fit into 3012 6 times, resulting in a remainder of 354.
The number 6 becomes the next digit in our result. 
Result so far: 196.0
Subtract 2658 from 3012 to get 354.
Bring next digit (7) of the dividend behind the 354 and repeat the process: 3547 / 443

Going ahead to step 6:
443 goes into 3547 8 times with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 1968.0
The remainder is 3 after subtracting 3544 from 3547.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 443

Advancing to step 7:
443 can be fit into 31 0 times, resulting in a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 19680.0
Subtract 0 from 31 to get 31.
Include the next digit (7) from the dividend after 31, then repeat: 317 / 443

Moving on to step 8:
443 goes into 317 0 times with a remainder of 317.
The number 0 becomes the next digit in our result. 
Result so far: 196800.0
Subtracting 0 from 317 leaves us with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Moving on to step 9:
The number 443 fits into 3170 7 times, leaving a remainder of 69.
The number 7 becomes the next digit in our result. 
Result so far: 196800.7
Deduct 3101 from 3170 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 10:
443 goes into 690 1 times with a remainder of 247.
The next digit of our result is 1. 
Result so far: 196800.71
The remainder is 247 after subtracting 443 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Step 11:
443 can be fit into 2470 5 times, resulting in a remainder of 255.
Put 5 as the next digit of the answer. 
Result so far: 196800.715
Subtract 2215 from 2470 to get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Advancing to step 12:
2550 divided by 443 is 5 with a remainder of 335.
The next digit of our result is 5. 
Result so far: 196800.7155
If we take 2215 away from 2550, we end up with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

After the division, we end up with 196800.7155 and a remainder of 0.00335.