We look at the division of 355224 by 68 
The aim is to understand the frequency of 68 in 355224.

Step 1:
3 divided by 68 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 68

On to step 2:
When dividing 35 by 68, we get 0 with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Take the next digit (5) from the dividend and append it to 35, then repeat: 355 / 68

Advancing to step 3:
355 divided by 68 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 340 from 355 and we're left with 15.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 68

On to step 4:
When dividing 152 by 68, we get 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 52.0
Subtract 136 from 152 to get 16.
Fetch the next digit (2) from the dividend, attach it to 16 and continue: 162 / 68

Advancing to step 5:
When dividing 162 by 68, we get 2 with a remainder of 26.
Use 2 as the next digit of our solution. 
Result so far: 522.0
If we take 136 away from 162, we end up with 26.
Fetch the next digit (4) from the dividend, attach it to 26 and continue: 264 / 68

Moving on to step 6:
68 goes into 264 3 times with a remainder of 60.
Record the quotient 3 as the next digit in the result. 
Result so far: 5223.0
Subtracting 204 from 264 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 7:
68 goes into 600 8 times with a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 5223.8
Deduct 544 from 600 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 8:
68 can be fit into 560 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 5223.88
If we subtract 544 from 560, we 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.

Our division results in 5223.88 with a remaining 0.016.