We're dividing 451620 by 40 
The aim is to understand the frequency of 40 in 451620.

Advancing to step 1:
The number 40 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 40

Let's proceed to step 2:
The number 40 fits into 45 1 times, leaving a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 5 after subtracting 40 from 45.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 40

Step 3:
40 goes into 51 1 times with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 40 from 51 leaves us with 11.
Include the next digit (6) from the dividend after 11, then repeat: 116 / 40

Moving on to step 4:
The number 40 fits into 116 2 times, leaving a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 112.0
Subtract 80 from 116 to get 36.
Grab the next digit (2) from the dividend, add it to 36, then carry on: 362 / 40

On to step 5:
362 divided by 40 is 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 1129.0
Subtract 360 from 362 to get 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 40

Step 6:
20 divided by 40 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 11290.0
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 7:
When dividing 200 by 40, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 11290.5
Subtract 200 from 200 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
40 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 11290.5
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
0 divided by 40 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 11290.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 11290.5, with a leftover of 0.0.