We look at the division of 4487459 by 331 
The aim is to understand the frequency of 331 in 4487459.

On to step 1:
When dividing 4 by 331, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 331

Advancing to step 2:
331 can be fit into 44 0 times, resulting in a remainder of 44.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 44 after subtracting 0 from 44.
Include the next digit (8) from the dividend after 44, then repeat: 448 / 331

Going ahead to step 3:
331 goes into 448 1 times with a remainder of 117.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 117 after subtracting 331 from 448.
Take the next digit (7) from the dividend and append it to 117, then repeat: 1177 / 331

Going ahead to step 4:
331 goes into 1177 3 times with a remainder of 184.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 993 from 1177 leaves us with 184.
Bring next digit (4) of the dividend behind the 184 and repeat the process: 1844 / 331

Step 5:
331 can be fit into 1844 5 times, resulting in a remainder of 189.
The next digit of our result is 5. 
Result so far: 135.0
The remainder is 189 after subtracting 1655 from 1844.
Append the next digit (5) from the dividend to 189 and continue with: 1895 / 331

On to step 6:
331 goes into 1895 5 times with a remainder of 240.
Put 5 as the next digit of the answer. 
Result so far: 1355.0
Deduct 1655 from 1895 and we're left with 240.
Bring next digit (9) of the dividend behind the 240 and repeat the process: 2409 / 331

Advancing to step 7:
331 can be fit into 2409 7 times, resulting in a remainder of 92.
The number 7 becomes the next digit in our result. 
Result so far: 13557.0
Subtracting 2317 from 2409 leaves us with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Let's proceed to step 8:
The number 331 fits into 920 2 times, leaving a remainder of 258.
Record the quotient 2 as the next digit in the result. 
Result so far: 13557.2
Subtract 662 from 920 to get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Step 9:
2580 divided by 331 is 7 with a remainder of 263.
Use 7 as the next digit of our solution. 
Result so far: 13557.27
Deduct 2317 from 2580 and we're left with 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Step 10:
2630 divided by 331 is 7 with a remainder of 313.
Write down 7 as next digit of the result. 
Result so far: 13557.277
The remainder is 313 after subtracting 2317 from 2630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

The final outcome is 13557.277, with a leftover of 0.0313.