We look at the division of 902166 by 50 
The aim is to understand the frequency of 50 in 902166.

Step 1:
If we divide 9 by 50, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 50

Moving on to step 2:
When dividing 90 by 50, we get 1 with a remainder of 40.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 50 from 90 leaves us with 40.
Take the next digit (2) from the dividend and append it to 40, then repeat: 402 / 50

Let's proceed to step 3:
The number 50 fits into 402 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we subtract 400 from 402, we get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 50

Advancing to step 4:
The number 50 fits into 21 0 times, leaving a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 180.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 50

On to step 5:
The number 50 fits into 216 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 1804.0
If we take 200 away from 216, we end up with 16.
Bring next digit (6) of the dividend behind the 16 and repeat the process: 166 / 50

Advancing to step 6:
50 can be fit into 166 3 times, resulting in a remainder of 16.
The next digit of our result is 3. 
Result so far: 18043.0
If we take 150 away from 166, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 7:
If we divide 160 by 50, we get 3 and a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 18043.3
The remainder is 10 after subtracting 150 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
100 divided by 50 is 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 18043.32
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 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: 18043.32
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.

Moving on to step 10:
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: 18043.32
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.

The final result is 18043.32 with a remainder of 0.0.