18631 ÷ 45 
The aim is to understand the frequency of 45 in 18631.

Let's proceed to step 1:
45 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 45

Let's proceed to step 2:
18 divided by 45 is 0 with a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Take the next digit (6) from the dividend and append it to 18, then repeat: 186 / 45

Moving on to step 3:
45 can be fit into 186 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 6 after subtracting 180 from 186.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 45

Step 4:
If we divide 63 by 45, we get 1 and a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 41.0
The remainder is 18 after subtracting 45 from 63.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 45

Advancing to step 5:
45 goes into 181 4 times with a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 414.0
If we subtract 180 from 181, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 6:
When dividing 10 by 45, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 414.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
The number 45 fits into 100 2 times, leaving a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 414.02
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
45 goes into 100 2 times with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 414.022
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 414.022 with a remaining 0.001.