We look at the division of 15917993 by 50 
The aim is to understand the frequency of 50 in 15917993.

Step 1:
The number 50 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 50

Let's proceed to step 2:
If we divide 15 by 50, we get 0 and a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 50

Let's proceed to step 3:
The number 50 fits into 159 3 times, leaving a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 150 from 159 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 50

Advancing to step 4:
50 can be fit into 91 1 times, resulting in a remainder of 41.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we take 50 away from 91, we end up with 41.
Fetch the next digit (7) from the dividend, attach it to 41 and continue: 417 / 50

Step 5:
50 can be fit into 417 8 times, resulting in a remainder of 17.
Write down 8 as next digit of the result. 
Result so far: 318.0
The remainder is 17 after subtracting 400 from 417.
Bring next digit (9) of the dividend behind the 17 and repeat the process: 179 / 50

Moving on to step 6:
If we divide 179 by 50, we get 3 and a remainder of 29.
The next digit of our result is 3. 
Result so far: 3183.0
Deduct 150 from 179 and we're left with 29.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 50

Moving on to step 7:
50 goes into 299 5 times with a remainder of 49.
Use 5 as the next digit of our solution. 
Result so far: 31835.0
Subtract 250 from 299 to get 49.
Append the next digit (3) from the dividend to 49 and continue with: 493 / 50

On to step 8:
The number 50 fits into 493 9 times, leaving a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 318359.0
Subtract 450 from 493 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 9:
50 can be fit into 430 8 times, resulting in a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 318359.8
Subtracting 400 from 430 leaves us 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.

Step 10:
300 divided by 50 is 6 with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 318359.86
Subtract 300 from 300 to 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.

Let's proceed to step 11:
When dividing 0 by 50, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 318359.86
If we take 0 away from 0, 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.

Step 12:
When dividing 0 by 50, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 318359.86
If we take 0 away from 0, 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.

The final outcome is 318359.86, with a leftover of 0.0.