We're dividing 504121 by 68 
The aim is to understand the frequency of 68 in 504121.

Moving on to step 1:
When dividing 5 by 68, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 68

Advancing to step 2:
If we divide 50 by 68, we get 0 and a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Include the next digit (4) from the dividend after 50, then repeat: 504 / 68

Advancing to step 3:
If we divide 504 by 68, we get 7 and a remainder of 28.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 28 after subtracting 476 from 504.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 68

Let's proceed to step 4:
68 goes into 281 4 times with a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 74.0
Subtracting 272 from 281 leaves us with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 68

Let's proceed to step 5:
92 divided by 68 is 1 with a remainder of 24.
Put 1 as the next digit of the answer. 
Result so far: 741.0
Subtracting 68 from 92 leaves us with 24.
Fetch the next digit (1) from the dividend, attach it to 24 and continue: 241 / 68

On to step 6:
68 goes into 241 3 times with a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 7413.0
The remainder is 37 after subtracting 204 from 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 7:
68 goes into 370 5 times with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 7413.5
Deduct 340 from 370 and we're left 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.

Moving on to step 8:
When dividing 300 by 68, we get 4 with a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 7413.54
If we subtract 272 from 300, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
The number 68 fits into 280 4 times, leaving a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 7413.544
If we take 272 away from 280, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 7413.544 and a remainder of 0.0008.