303886 ÷ 42 
The aim is to understand the frequency of 42 in 303886.

Advancing to step 1:
If we divide 3 by 42, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 42

Moving on to step 2:
42 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 30, we get 30.
Grab the next digit (3) from the dividend, add it to 30, then carry on: 303 / 42

On to step 3:
42 can be fit into 303 7 times, resulting in a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 294 from 303 leaves us with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 42

Step 4:
98 divided by 42 is 2 with a remainder of 14.
The next digit of our result is 2. 
Result so far: 72.0
The remainder is 14 after subtracting 84 from 98.
Bring next digit (8) of the dividend behind the 14 and repeat the process: 148 / 42

Advancing to step 5:
148 divided by 42 is 3 with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 723.0
If we subtract 126 from 148, we get 22.
Take the next digit (6) from the dividend and append it to 22, then repeat: 226 / 42

Let's proceed to step 6:
If we divide 226 by 42, we get 5 and a remainder of 16.
The number 5 becomes the next digit in our result. 
Result so far: 7235.0
The remainder is 16 after subtracting 210 from 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 7:
160 divided by 42 is 3 with a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 7235.3
If we take 126 away from 160, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
340 divided by 42 is 8 with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 7235.38
The remainder is 4 after subtracting 336 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
42 can be fit into 40 0 times, resulting in a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7235.38
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
42 can be fit into 400 9 times, resulting in a remainder of 22.
Record the quotient 9 as the next digit in the result. 
Result so far: 7235.3809
The remainder is 22 after subtracting 378 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 11:
The number 42 fits into 220 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 7235.38095
The remainder is 10 after subtracting 210 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
42 goes into 100 2 times with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 7235.380952
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
160 divided by 42 is 3 with a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 7235.3809523
Subtract 126 from 160 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 14:
If we divide 340 by 42, we get 8 and a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 7235.38095238
If we take 336 away from 340, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 7235.38095238, with a leftover of 4e-09.