We're dividing 212592 by 42 
The aim is to understand the frequency of 42 in 212592.

On to step 1:
2 divided by 42 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 42

Advancing to step 2:
42 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 42

Advancing to step 3:
42 goes into 212 5 times with a remainder of 2.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 210 from 212 to get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 42

Step 4:
25 divided by 42 is 0 with a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 50.0
If we subtract 0 from 25, we get 25.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 42

Going ahead to step 5:
When dividing 259 by 42, we get 6 with a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 506.0
If we take 252 away from 259, we end up with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 42

Advancing to step 6:
When dividing 72 by 42, we get 1 with a remainder of 30.
Write down 1 as next digit of the result. 
Result so far: 5061.0
Subtracting 42 from 72 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:
300 divided by 42 is 7 with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 5061.7
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.

On to step 8:
60 divided by 42 is 1 with a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 5061.71
If we subtract 42 from 60, we get 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 9:
When dividing 180 by 42, we get 4 with a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 5061.714
Subtracting 168 from 180 leaves us 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.

Step 10:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 5061.7142
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:
When dividing 360 by 42, we get 8 with a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 5061.71428
Subtract 336 from 360 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
42 goes into 240 5 times with a remainder of 30.
The next digit of our result is 5. 
Result so far: 5061.714285
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.

Going ahead to step 13:
42 can be fit into 300 7 times, resulting in a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 5061.7142857
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.

Going ahead to step 14:
42 goes into 60 1 times with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 5061.71428571
If we subtract 42 from 60, we get 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 quotient of the division is 5061.71428571, and the remainder is 1.8e-08.