Let's divide 394451 by 42
The aim is to understand the frequency of 42 in 394451.

Advancing to step 1:
When dividing 3 by 42, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 42

Advancing to step 2:
39 divided by 42 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Grab the next digit (4) from the dividend, add it to 39, then carry on: 394 / 42

Let's proceed to step 3:
When dividing 394 by 42, we get 9 with a remainder of 16.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 378 from 394 leaves us with 16.
Take the next digit (4) from the dividend and append it to 16, then repeat: 164 / 42

Let's proceed to step 4:
If we divide 164 by 42, we get 3 and a remainder of 38.
Use 3 as the next digit of our solution. 
Result so far: 93.0
Deduct 126 from 164 and we're left with 38.
Bring next digit (5) of the dividend behind the 38 and repeat the process: 385 / 42

Let's proceed to step 5:
42 can be fit into 385 9 times, resulting in a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 939.0
Deduct 378 from 385 and we're left with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 42

Moving on to step 6:
42 can be fit into 71 1 times, resulting in a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 9391.0
Subtracting 42 from 71 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 7:
290 divided by 42 is 6 with a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 9391.6
The remainder is 38 after subtracting 252 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 8:
If we divide 380 by 42, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 9391.69
Subtract 378 from 380 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
42 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 9391.69
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
42 goes into 200 4 times with a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 9391.6904
Deduct 168 from 200 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 11:
If we divide 320 by 42, we get 7 and a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 9391.69047
Subtracting 294 from 320 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 12:
When dividing 260 by 42, we get 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 9391.690476
Subtract 252 from 260 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 13:
42 goes into 80 1 times with a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 9391.6904761
Subtract 42 from 80 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 14:
The number 42 fits into 380 9 times, leaving a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 9391.69047619
Subtracting 378 from 380 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 9391.69047619, with a leftover of 2e-09.