900590 ÷ 50 
The aim is to understand the frequency of 50 in 900590.

Step 1:
If we divide 9 by 50, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 50

Step 2:
If we divide 90 by 50, we get 1 and a remainder of 40.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 50 from 90, we get 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 50

Going ahead to step 3:
50 can be fit into 400 8 times, resulting in a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we subtract 400 from 400, we get 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 50

Advancing to step 4:
5 divided by 50 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 180.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 50

Going ahead to step 5:
59 divided by 50 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1801.0
If we take 50 away from 59, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 50

Advancing to step 6:
If we divide 90 by 50, we get 1 and a remainder of 40.
The number 1 becomes the next digit in our result. 
Result so far: 18011.0
The remainder is 40 after subtracting 50 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 7:
400 divided by 50 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 18011.8
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.

On to step 8:
When dividing 0 by 50, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 18011.8
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.

Going ahead to step 9:
If we divide 0 by 50, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 18011.8
Subtract 0 from 0 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.

After the division, we end up with 18011.8 and a remainder of 0.0.