We divide 637850 by 40
The aim is to understand the frequency of 40 in 637850.

Step 1:
40 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 40

Moving on to step 2:
If we divide 63 by 40, we get 1 and a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 40 from 63 and we're left with 23.
Grab the next digit (7) from the dividend, add it to 23, then carry on: 237 / 40

Let's proceed to step 3:
40 goes into 237 5 times with a remainder of 37.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 200 from 237 leaves us with 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 40

On to step 4:
The number 40 fits into 378 9 times, leaving a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 159.0
Subtracting 360 from 378 leaves us with 18.
Grab the next digit (5) from the dividend, add it to 18, then carry on: 185 / 40

Advancing to step 5:
The number 40 fits into 185 4 times, leaving a remainder of 25.
The next digit of our result is 4. 
Result so far: 1594.0
If we subtract 160 from 185, we get 25.
Include the next digit (0) from the dividend after 25, then repeat: 250 / 40

Let's proceed to step 6:
40 goes into 250 6 times with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 15946.0
If we subtract 240 from 250, we 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.

On to step 7:
40 can be fit into 100 2 times, resulting in a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 15946.2
Deduct 80 from 100 and we're left 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.

Advancing to step 8:
40 goes into 200 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 15946.25
If we take 200 away from 200, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
If we divide 0 by 40, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 15946.25
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.

Let's proceed to step 10:
40 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 15946.25
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 result is 15946.25 with a remainder of 0.0.