We look at the division of 669885 by 50 
The aim is to understand the frequency of 50 in 669885.

Advancing to step 1:
If we divide 6 by 50, we get 0 and a remainder of 6.
Write down 0 as next digit of 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

Moving on to step 2:
When dividing 66 by 50, we get 1 with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 50 from 66 and we're left with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 50

Going ahead to step 3:
The number 50 fits into 169 3 times, leaving a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtracting 150 from 169 leaves us with 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 50

Advancing to step 4:
If we divide 198 by 50, we get 3 and a remainder of 48.
Write down 3 as next digit of the result. 
Result so far: 133.0
If we subtract 150 from 198, we get 48.
Append the next digit (8) from the dividend to 48 and continue with: 488 / 50

Going ahead to step 5:
50 goes into 488 9 times with a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 1339.0
Subtract 450 from 488 to get 38.
Grab the next digit (5) from the dividend, add it to 38, then carry on: 385 / 50

On to step 6:
The number 50 fits into 385 7 times, leaving a remainder of 35.
Use 7 as the next digit of our solution. 
Result so far: 13397.0
If we subtract 350 from 385, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 7:
50 goes into 350 7 times with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 13397.7
The remainder is 0 after subtracting 350 from 350.
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.
Put 0 as the next digit of the answer. 
Result so far: 13397.7
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.

Let's proceed to step 9:
50 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 13397.7
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 13397.7 with a remaining 0.0.