We're dividing 664891 by 42 
The aim is to understand the frequency of 42 in 664891.

Going ahead to step 1:
42 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 42

Advancing to step 2:
66 divided by 42 is 1 with a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 42 from 66 to get 24.
Grab the next digit (4) from the dividend, add it to 24, then carry on: 244 / 42

On to step 3:
If we divide 244 by 42, we get 5 and a remainder of 34.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 210 from 244 leaves us with 34.
Append the next digit (8) from the dividend to 34 and continue with: 348 / 42

Advancing to step 4:
42 can be fit into 348 8 times, resulting in a remainder of 12.
The next digit of our result is 8. 
Result so far: 158.0
If we take 336 away from 348, we end up with 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 42

On to step 5:
42 can be fit into 129 3 times, resulting in a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 1583.0
If we take 126 away from 129, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 42

On to step 6:
If we divide 31 by 42, we get 0 and a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 15830.0
The remainder is 31 after subtracting 0 from 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 7:
42 can be fit into 310 7 times, resulting in a remainder of 16.
Write down 7 as next digit of the result. 
Result so far: 15830.7
Subtract 294 from 310 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 8:
The number 42 fits into 160 3 times, leaving a remainder of 34.
Use 3 as the next digit of our solution. 
Result so far: 15830.73
Subtracting 126 from 160 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 9:
When dividing 340 by 42, we get 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 15830.738
Deduct 336 from 340 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
When dividing 40 by 42, we get 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 15830.738
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
If we divide 400 by 42, we get 9 and a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 15830.73809
The remainder is 22 after subtracting 378 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 12:
42 goes into 220 5 times with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 15830.738095
Deduct 210 from 220 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
42 can be fit into 100 2 times, resulting in a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 15830.7380952
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 14:
When dividing 160 by 42, we get 3 with a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 15830.73809523
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

In conclusion, the division gives 15830.73809523 with a balance of 3.4e-08.