We're dividing 168575 by 42 
The aim is to understand the frequency of 42 in 168575.

Let's proceed to step 1:
42 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 42

Step 2:
If we divide 16 by 42, we get 0 and a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Take the next digit (8) from the dividend and append it to 16, then repeat: 168 / 42

Advancing to step 3:
168 divided by 42 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 168 from 168 leaves us with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 42

Step 4:
When dividing 5 by 42, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 42

Step 5:
57 divided by 42 is 1 with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 401.0
Deduct 42 from 57 and we're left with 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 42

Let's proceed to step 6:
42 can be fit into 155 3 times, resulting in a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 4013.0
Subtract 126 from 155 to get 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:
42 can be fit into 290 6 times, resulting in a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 4013.6
Deduct 252 from 290 and we're left with 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 8:
The number 42 fits into 380 9 times, leaving a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 4013.69
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.

Moving on to step 9:
20 divided by 42 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 4013.69
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.

Moving on to step 10:
If we divide 200 by 42, we get 4 and a remainder of 32.
The next digit of our result is 4. 
Result so far: 4013.6904
If we take 168 away from 200, we end up 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.

Let's proceed to step 11:
42 can be fit into 320 7 times, resulting in a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 4013.69047
Subtract 294 from 320 to get 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:
The number 42 fits into 260 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 4013.690476
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.

Going ahead to step 13:
42 goes into 80 1 times with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 4013.6904761
If we subtract 42 from 80, we 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.

Moving on to step 14:
380 divided by 42 is 9 with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 4013.69047619
If we subtract 378 from 380, we 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.

The final result is 4013.69047619 with a remainder of 2e-09.