Let's divide 668860 by 50
The aim is to understand the frequency of 50 in 668860.

Step 1:
When dividing 6 by 50, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 50

Going ahead to step 2:
50 can be fit into 66 1 times, resulting in a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 50 from 66, we get 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 50

Moving on to step 3:
When dividing 168 by 50, we get 3 with a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 150 from 168, we get 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 50

Going ahead to step 4:
188 divided by 50 is 3 with a remainder of 38.
The number 3 becomes the next digit in our result. 
Result so far: 133.0
The remainder is 38 after subtracting 150 from 188.
Append the next digit (6) from the dividend to 38 and continue with: 386 / 50

Moving on to step 5:
When dividing 386 by 50, we get 7 with a remainder of 36.
Put 7 as the next digit of the answer. 
Result so far: 1337.0
Subtracting 350 from 386 leaves us with 36.
Grab the next digit (0) from the dividend, add it to 36, then carry on: 360 / 50

Moving on to step 6:
If we divide 360 by 50, we get 7 and a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 13377.0
Subtracting 350 from 360 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 7:
100 divided by 50 is 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 13377.2
Subtracting 100 from 100 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
50 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 13377.2
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
The number 50 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 13377.2
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 13377.2 with a remainder of 0.0.