We look at the division of 215072 by 45 
The aim is to understand the frequency of 45 in 215072.

Moving on to step 1:
The number 45 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 45

Going ahead to step 2:
If we divide 21 by 45, we get 0 and a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 45

Step 3:
45 can be fit into 215 4 times, resulting in a remainder of 35.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 180 from 215 to get 35.
Bring next digit (0) of the dividend behind the 35 and repeat the process: 350 / 45

On to step 4:
If we divide 350 by 45, we get 7 and a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 47.0
Deduct 315 from 350 and we're left with 35.
Include the next digit (7) from the dividend after 35, then repeat: 357 / 45

Step 5:
The number 45 fits into 357 7 times, leaving a remainder of 42.
The number 7 becomes the next digit in our result. 
Result so far: 477.0
If we subtract 315 from 357, we get 42.
Grab the next digit (2) from the dividend, add it to 42, then carry on: 422 / 45

Moving on to step 6:
If we divide 422 by 45, we get 9 and a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 4779.0
If we subtract 405 from 422, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
45 goes into 170 3 times with a remainder of 35.
The next digit of our result is 3. 
Result so far: 4779.3
Subtracting 135 from 170 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 8:
When dividing 350 by 45, we get 7 with a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 4779.37
Subtract 315 from 350 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 9:
45 can be fit into 350 7 times, resulting in a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 4779.377
Subtract 315 from 350 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 4779.377, with a leftover of 0.0035.