We look at the division of 13989 by 50 
The aim is to understand the frequency of 50 in 13989.

On to step 1:
When dividing 1 by 50, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 50

Going ahead to step 2:
50 goes into 13 0 times with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 50

Step 3:
50 can be fit into 139 2 times, resulting in a remainder of 39.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 100 away from 139, we end up with 39.
Fetch the next digit (8) from the dividend, attach it to 39 and continue: 398 / 50

Moving on to step 4:
The number 50 fits into 398 7 times, leaving a remainder of 48.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
Subtract 350 from 398 to get 48.
Fetch the next digit (9) from the dividend, attach it to 48 and continue: 489 / 50

Step 5:
When dividing 489 by 50, we get 9 with a remainder of 39.
Write down 9 as next digit of the result. 
Result so far: 279.0
Subtracting 450 from 489 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 6:
390 divided by 50 is 7 with a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 279.7
Deduct 350 from 390 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.

On to step 7:
If we divide 400 by 50, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 279.78
If we take 400 away from 400, we end up 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.

Let's proceed to step 8:
0 divided by 50 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 279.78
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.

Step 9:
0 divided by 50 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 279.78
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.

After the division, we end up with 279.78 and a remainder of 0.0.