Let's divide 636388 by 45
The aim is to understand the frequency of 45 in 636388.

Going ahead to step 1:
45 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 45

Let's proceed to step 2:
63 divided by 45 is 1 with a remainder of 18.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 45 from 63 and we're left with 18.
Take the next digit (6) from the dividend and append it to 18, then repeat: 186 / 45

Advancing to step 3:
186 divided by 45 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
If we subtract 180 from 186, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 45

Moving on to step 4:
The number 45 fits into 63 1 times, leaving a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 141.0
Deduct 45 from 63 and we're left with 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 45

Let's proceed to step 5:
188 divided by 45 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 1414.0
Subtract 180 from 188 to get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 45

Let's proceed to step 6:
If we divide 88 by 45, we get 1 and a remainder of 43.
Record the quotient 1 as the next digit in the result. 
Result so far: 14141.0
Subtract 45 from 88 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
430 divided by 45 is 9 with a remainder of 25.
Put 9 as the next digit of the answer. 
Result so far: 14141.9
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 8:
The number 45 fits into 250 5 times, leaving a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 14141.95
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
When dividing 250 by 45, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 14141.955
Subtracting 225 from 250 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 14141.955 and a remainder of 0.0025.