Let's divide 409086 by 42
The aim is to understand the frequency of 42 in 409086.

Going ahead to step 1:
42 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
If we subtract 0 from 4, we get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 42

Advancing to step 2:
42 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Take the next digit (9) from the dividend and append it to 40, then repeat: 409 / 42

Step 3:
42 can be fit into 409 9 times, resulting in a remainder of 31.
The next digit of our result is 9. 
Result so far: 9.0
If we take 378 away from 409, we end up with 31.
Fetch the next digit (0) from the dividend, attach it to 31 and continue: 310 / 42

On to step 4:
When dividing 310 by 42, we get 7 with a remainder of 16.
The next digit of our result is 7. 
Result so far: 97.0
If we subtract 294 from 310, we get 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 42

Step 5:
If we divide 168 by 42, we get 4 and a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 974.0
Deduct 168 from 168 and we're left with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 42

On to step 6:
42 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 9740.0
Subtract 0 from 6 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
When dividing 60 by 42, we get 1 with a remainder of 18.
The next digit of our result is 1. 
Result so far: 9740.1
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 8:
The number 42 fits into 180 4 times, leaving a remainder of 12.
The next digit of our result is 4. 
Result so far: 9740.14
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
42 can be fit into 120 2 times, resulting in a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 9740.142
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 10:
360 divided by 42 is 8 with a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 9740.1428
Subtract 336 from 360 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
240 divided by 42 is 5 with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 9740.14285
Subtract 210 from 240 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 12:
42 goes into 300 7 times with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 9740.142857
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 13:
The number 42 fits into 60 1 times, leaving a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 9740.1428571
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 14:
42 can be fit into 180 4 times, resulting in a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 9740.14285714
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 9740.14285714 with a remaining 1.2e-08.