We divide 290964 by 90
The aim is to understand the frequency of 90 in 290964.

Let's proceed to step 1:
When dividing 2 by 90, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 90

Advancing to step 2:
If we divide 29 by 90, we get 0 and a remainder of 29.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 29, we end up with 29.
Bring next digit (0) of the dividend behind the 29 and repeat the process: 290 / 90

Let's proceed to step 3:
290 divided by 90 is 3 with a remainder of 20.
The next digit of our result is 3. 
Result so far: 3.0
If we take 270 away from 290, we end up with 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 90

Moving on to step 4:
90 can be fit into 209 2 times, resulting in a remainder of 29.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
Deduct 180 from 209 and we're left with 29.
Take the next digit (6) from the dividend and append it to 29, then repeat: 296 / 90

Going ahead to step 5:
If we divide 296 by 90, we get 3 and a remainder of 26.
The next digit of our result is 3. 
Result so far: 323.0
Subtracting 270 from 296 leaves us with 26.
Include the next digit (4) from the dividend after 26, then repeat: 264 / 90

Step 6:
90 goes into 264 2 times with a remainder of 84.
The number 2 becomes the next digit in our result. 
Result so far: 3232.0
If we subtract 180 from 264, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 7:
If we divide 840 by 90, we get 9 and a remainder of 30.
Record the quotient 9 as the next digit in the result. 
Result so far: 3232.9
If we take 810 away from 840, we end up 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 8:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 3232.93
Subtracting 270 from 300 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.

Going ahead to step 9:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 3232.933
If we take 270 away from 300, we end up 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.

The final outcome is 3232.933, with a leftover of 0.003.