686385 divided by 40 
The aim is to understand the frequency of 40 in 686385.

Let's proceed to step 1:
The number 40 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 40

Step 2:
If we divide 68 by 40, we get 1 and a remainder of 28.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 40 from 68, we get 28.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 40

Step 3:
40 goes into 286 7 times with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
If we take 280 away from 286, we end up with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 40

Advancing to step 4:
40 can be fit into 63 1 times, resulting in a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 171.0
The remainder is 23 after subtracting 40 from 63.
Bring next digit (8) of the dividend behind the 23 and repeat the process: 238 / 40

On to step 5:
40 can be fit into 238 5 times, resulting in a remainder of 38.
Write down 5 as next digit of the result. 
Result so far: 1715.0
Deduct 200 from 238 and we're left with 38.
Grab the next digit (5) from the dividend, add it to 38, then carry on: 385 / 40

Step 6:
If we divide 385 by 40, we get 9 and a remainder of 25.
Put 9 as the next digit of the answer. 
Result so far: 17159.0
If we take 360 away from 385, we end up 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.

On to step 7:
250 divided by 40 is 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 17159.6
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.

Let's proceed to step 8:
When dividing 100 by 40, we get 2 with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 17159.62
Subtracting 80 from 100 leaves us 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.

Step 9:
40 can be fit into 200 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 17159.625
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.

Moving on to step 10:
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: 17159.625
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.

Step 11:
The number 40 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17159.625
Subtracting 0 from 0 leaves us 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.

The quotient of the division is 17159.625, and the remainder is 0.0.