We look at the division of 87680255 by 431 
The aim is to understand the frequency of 431 in 87680255.

Step 1:
If we divide 8 by 431, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 431

Let's proceed to step 2:
431 goes into 87 0 times with a remainder of 87.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 87 after subtracting 0 from 87.
Include the next digit (6) from the dividend after 87, then repeat: 876 / 431

Going ahead to step 3:
431 can be fit into 876 2 times, resulting in a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 862 from 876 to get 14.
Include the next digit (8) from the dividend after 14, then repeat: 148 / 431

Going ahead to step 4:
431 can be fit into 148 0 times, resulting in a remainder of 148.
Write down 0 as next digit of the result. 
Result so far: 20.0
Subtracting 0 from 148 leaves us with 148.
Include the next digit (0) from the dividend after 148, then repeat: 1480 / 431

Going ahead to step 5:
431 can be fit into 1480 3 times, resulting in a remainder of 187.
Put 3 as the next digit of the answer. 
Result so far: 203.0
If we take 1293 away from 1480, we end up with 187.
Grab the next digit (2) from the dividend, add it to 187, then carry on: 1872 / 431

Let's proceed to step 6:
1872 divided by 431 is 4 with a remainder of 148.
Put 4 as the next digit of the answer. 
Result so far: 2034.0
Deduct 1724 from 1872 and we're left with 148.
Grab the next digit (5) from the dividend, add it to 148, then carry on: 1485 / 431

On to step 7:
The number 431 fits into 1485 3 times, leaving a remainder of 192.
The number 3 becomes the next digit in our result. 
Result so far: 20343.0
Subtract 1293 from 1485 to get 192.
Grab the next digit (5) from the dividend, add it to 192, then carry on: 1925 / 431

Let's proceed to step 8:
If we divide 1925 by 431, we get 4 and a remainder of 201.
Use 4 as the next digit of our solution. 
Result so far: 203434.0
Subtract 1724 from 1925 to get 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 9:
431 can be fit into 2010 4 times, resulting in a remainder of 286.
Write down 4 as next digit of the result. 
Result so far: 203434.4
If we subtract 1724 from 2010, we get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Step 10:
If we divide 2860 by 431, we get 6 and a remainder of 274.
Use 6 as the next digit of our solution. 
Result so far: 203434.46
If we take 2586 away from 2860, we end up with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Let's proceed to step 11:
431 can be fit into 2740 6 times, resulting in a remainder of 154.
Put 6 as the next digit of the answer. 
Result so far: 203434.466
If we subtract 2586 from 2740, we get 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

After the division, we end up with 203434.466 and a remainder of 0.0154.