We look at the division of 9020921 by 180 
The aim is to understand the frequency of 180 in 9020921.

Let's proceed to step 1:
If we divide 9 by 180, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 180

Going ahead to step 2:
The number 180 fits into 90 0 times, leaving a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Bring next digit (2) of the dividend behind the 90 and repeat the process: 902 / 180

Step 3:
When dividing 902 by 180, we get 5 with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 900 from 902 leaves us with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 180

On to step 4:
180 goes into 20 0 times with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 50.0
The remainder is 20 after subtracting 0 from 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 180

On to step 5:
If we divide 209 by 180, we get 1 and a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 501.0
If we take 180 away from 209, we end up with 29.
Fetch the next digit (2) from the dividend, attach it to 29 and continue: 292 / 180

Going ahead to step 6:
If we divide 292 by 180, we get 1 and a remainder of 112.
The number 1 becomes the next digit in our result. 
Result so far: 5011.0
If we take 180 away from 292, we end up with 112.
Bring next digit (1) of the dividend behind the 112 and repeat the process: 1121 / 180

Advancing to step 7:
When dividing 1121 by 180, we get 6 with a remainder of 41.
The number 6 becomes the next digit in our result. 
Result so far: 50116.0
The remainder is 41 after subtracting 1080 from 1121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 8:
If we divide 410 by 180, we get 2 and a remainder of 50.
Record the quotient 2 as the next digit in the result. 
Result so far: 50116.2
If we take 360 away from 410, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 9:
180 can be fit into 500 2 times, resulting in a remainder of 140.
Record the quotient 2 as the next digit in the result. 
Result so far: 50116.22
Subtracting 360 from 500 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

After the division, we end up with 50116.22 and a remainder of 0.14.