We look at the division of 860358 by 42 
The aim is to understand the frequency of 42 in 860358.

Advancing to step 1:
The number 42 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 42

Step 2:
86 divided by 42 is 2 with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 84 from 86 leaves us with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 42

Moving on to step 3:
The number 42 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 20 leaves us with 20.
Include the next digit (3) from the dividend after 20, then repeat: 203 / 42

Let's proceed to step 4:
42 goes into 203 4 times with a remainder of 35.
Record the quotient 4 as the next digit in the result. 
Result so far: 204.0
If we take 168 away from 203, we end up with 35.
Fetch the next digit (5) from the dividend, attach it to 35 and continue: 355 / 42

Going ahead to step 5:
355 divided by 42 is 8 with a remainder of 19.
Record the quotient 8 as the next digit in the result. 
Result so far: 2048.0
Subtract 336 from 355 to get 19.
Bring next digit (8) of the dividend behind the 19 and repeat the process: 198 / 42

Advancing to step 6:
When dividing 198 by 42, we get 4 with a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 20484.0
Subtracting 168 from 198 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 7:
42 can be fit into 300 7 times, resulting in a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 20484.7
If we subtract 294 from 300, we 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.

Let's proceed to step 8:
42 goes into 60 1 times with a remainder of 18.
The next digit of our result is 1. 
Result so far: 20484.71
Deduct 42 from 60 and we're left 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 9:
When dividing 180 by 42, we get 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 20484.714
If we take 168 away from 180, we end up 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.

Moving on to step 10:
120 divided by 42 is 2 with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 20484.7142
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
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: 20484.71428
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.

Going ahead to step 12:
42 goes into 240 5 times with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 20484.714285
If we take 210 away from 240, we end up with 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 13:
The number 42 fits into 300 7 times, leaving a remainder of 6.
The next digit of our result is 7. 
Result so far: 20484.7142857
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.

Step 14:
42 can be fit into 60 1 times, resulting in a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 20484.71428571
Deduct 42 from 60 and we're left 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.

The final outcome is 20484.71428571, with a leftover of 1.8e-08.