We look at the division of 486142 by 45 
The aim is to understand the frequency of 45 in 486142.

Going ahead to step 1:
45 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 45

Moving on to step 2:
The number 45 fits into 48 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
If we take 45 away from 48, we end up with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 45

Step 3:
36 divided by 45 is 0 with a remainder of 36.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 36, we get 36.
Include the next digit (1) from the dividend after 36, then repeat: 361 / 45

Step 4:
When dividing 361 by 45, we get 8 with a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 108.0
If we subtract 360 from 361, we get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 45

Going ahead to step 5:
45 goes into 14 0 times with a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 1080.0
If we subtract 0 from 14, we get 14.
Append the next digit (2) from the dividend to 14 and continue with: 142 / 45

Going ahead to step 6:
When dividing 142 by 45, we get 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 10803.0
If we take 135 away from 142, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
The number 45 fits into 70 1 times, leaving a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 10803.1
Deduct 45 from 70 and we're left 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.

Advancing to step 8:
45 goes into 250 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 10803.15
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.

Moving on to step 9:
The number 45 fits into 250 5 times, leaving a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 10803.155
Deduct 225 from 250 and we're left 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.

The final result is 10803.155 with a remainder of 0.0025.