We look at the division of 900688 by 42 
The aim is to understand the frequency of 42 in 900688.

Step 1:
42 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 42

On to step 2:
When dividing 90 by 42, we get 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 84 from 90, we get 6.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 42

Going ahead to step 3:
42 goes into 60 1 times with a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
The remainder is 18 after subtracting 42 from 60.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 42

Advancing to step 4:
42 goes into 186 4 times with a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 214.0
Subtract 168 from 186 to get 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 42

Moving on to step 5:
If we divide 188 by 42, we get 4 and a remainder of 20.
The next digit of our result is 4. 
Result so far: 2144.0
Subtracting 168 from 188 leaves us with 20.
Take the next digit (8) from the dividend and append it to 20, then repeat: 208 / 42

Let's proceed to step 6:
The number 42 fits into 208 4 times, leaving a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 21444.0
Deduct 168 from 208 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 7:
42 can be fit into 400 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 21444.9
Deduct 378 from 400 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 8:
42 can be fit into 220 5 times, resulting in a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 21444.95
Subtracting 210 from 220 leaves us 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.

Moving on to step 9:
The number 42 fits into 100 2 times, leaving a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 21444.952
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.

Step 10:
42 can be fit into 160 3 times, resulting in a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 21444.9523
Subtract 126 from 160 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
If we divide 340 by 42, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 21444.95238
Subtracting 336 from 340 leaves us 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.

Step 12:
40 divided by 42 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 21444.95238
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 13:
The number 42 fits into 400 9 times, leaving a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 21444.9523809
If we take 378 away from 400, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 14:
42 can be fit into 220 5 times, resulting in a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 21444.95238095
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.

The final outcome is 21444.95238095, with a leftover of 1e-08.