49542345 ÷ 42 
The aim is to understand the frequency of 42 in 49542345.

Let's proceed to step 1:
42 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 42

Going ahead to step 2:
If we divide 49 by 42, we get 1 and a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 42 from 49 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 42

Let's proceed to step 3:
The number 42 fits into 75 1 times, leaving a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtracting 42 from 75 leaves us with 33.
Include the next digit (4) from the dividend after 33, then repeat: 334 / 42

Step 4:
42 can be fit into 334 7 times, resulting in a remainder of 40.
The next digit of our result is 7. 
Result so far: 117.0
If we subtract 294 from 334, we get 40.
Grab the next digit (2) from the dividend, add it to 40, then carry on: 402 / 42

Let's proceed to step 5:
402 divided by 42 is 9 with a remainder of 24.
Use 9 as the next digit of our solution. 
Result so far: 1179.0
If we subtract 378 from 402, we get 24.
Take the next digit (3) from the dividend and append it to 24, then repeat: 243 / 42

On to step 6:
42 can be fit into 243 5 times, resulting in a remainder of 33.
Record the quotient 5 as the next digit in the result. 
Result so far: 11795.0
Deduct 210 from 243 and we're left with 33.
Grab the next digit (4) from the dividend, add it to 33, then carry on: 334 / 42

Advancing to step 7:
The number 42 fits into 334 7 times, leaving a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 117957.0
If we take 294 away from 334, we end up with 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 42

On to step 8:
42 can be fit into 405 9 times, resulting in a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 1179579.0
The remainder is 27 after subtracting 378 from 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 9:
The number 42 fits into 270 6 times, leaving a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 1179579.6
Subtracting 252 from 270 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.

On to step 10:
If we divide 180 by 42, we get 4 and a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 1179579.64
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.

Advancing to step 11:
The number 42 fits into 120 2 times, leaving a remainder of 36.
The next digit of our result is 2. 
Result so far: 1179579.642
Deduct 84 from 120 and we're left with 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 12:
The number 42 fits into 360 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 1179579.6428
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 13:
If we divide 240 by 42, we get 5 and a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 1179579.64285
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.

Moving on to step 14:
The number 42 fits into 300 7 times, leaving a remainder of 6.
The next digit of our result is 7. 
Result so far: 1179579.642857
Subtracting 294 from 300 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 15:
If we divide 60 by 42, we get 1 and a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1179579.6428571
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.

Step 16:
If we divide 180 by 42, we get 4 and a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 1179579.64285714
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.

The final outcome is 1179579.64285714, with a leftover of 1.2e-08.