We look at the division of 746615 by 42 
The aim is to understand the frequency of 42 in 746615.

Step 1:
If we divide 7 by 42, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 42

Moving on to step 2:
The number 42 fits into 74 1 times, leaving a remainder of 32.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 42 from 74 and we're left with 32.
Grab the next digit (6) from the dividend, add it to 32, then carry on: 326 / 42

Step 3:
42 can be fit into 326 7 times, resulting in a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 17.0
Subtracting 294 from 326 leaves us with 32.
Include the next digit (6) from the dividend after 32, then repeat: 326 / 42

Step 4:
42 can be fit into 326 7 times, resulting in a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 177.0
Deduct 294 from 326 and we're left with 32.
Grab the next digit (1) from the dividend, add it to 32, then carry on: 321 / 42

Moving on to step 5:
42 goes into 321 7 times with a remainder of 27.
The next digit of our result is 7. 
Result so far: 1777.0
Subtracting 294 from 321 leaves us with 27.
Include the next digit (5) from the dividend after 27, then repeat: 275 / 42

Advancing to step 6:
When dividing 275 by 42, we get 6 with a remainder of 23.
The number 6 becomes the next digit in our result. 
Result so far: 17776.0
If we take 252 away from 275, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 7:
If we divide 230 by 42, we get 5 and a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 17776.5
Deduct 210 from 230 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
When dividing 200 by 42, we get 4 with a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 17776.54
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.

On to step 9:
When dividing 320 by 42, we get 7 with a remainder of 26.
The next digit of our result is 7. 
Result so far: 17776.547
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.

Going ahead to step 10:
260 divided by 42 is 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 17776.5476
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 11:
42 goes into 80 1 times with a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 17776.54761
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 12:
42 can be fit into 380 9 times, resulting in a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 17776.547619
If we take 378 away from 380, we end up 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.

Let's proceed to step 13:
When dividing 20 by 42, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 17776.547619
If we subtract 0 from 20, we 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 14:
200 divided by 42 is 4 with a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 17776.54761904
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.

After the division, we end up with 17776.54761904 and a remainder of 3.2e-08.