278881 ÷ 90 
The aim is to understand the frequency of 90 in 278881.

Going ahead to step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 90

Advancing to step 2:
If we divide 27 by 90, we get 0 and a remainder of 27.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 27 after subtracting 0 from 27.
Append the next digit (8) from the dividend to 27 and continue with: 278 / 90

Moving on to step 3:
If we divide 278 by 90, we get 3 and a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 270 away from 278, we end up with 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 90

Going ahead to step 4:
90 can be fit into 88 0 times, resulting in a remainder of 88.
Write down 0 as next digit of the result. 
Result so far: 30.0
If we subtract 0 from 88, we get 88.
Append the next digit (8) from the dividend to 88 and continue with: 888 / 90

Moving on to step 5:
90 goes into 888 9 times with a remainder of 78.
Use 9 as the next digit of our solution. 
Result so far: 309.0
Subtract 810 from 888 to get 78.
Include the next digit (1) from the dividend after 78, then repeat: 781 / 90

Let's proceed to step 6:
The number 90 fits into 781 8 times, leaving a remainder of 61.
The number 8 becomes the next digit in our result. 
Result so far: 3098.0
Subtracting 720 from 781 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 7:
If we divide 610 by 90, we get 6 and a remainder of 70.
The number 6 becomes the next digit in our result. 
Result so far: 3098.6
Subtract 540 from 610 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
700 divided by 90 is 7 with a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 3098.67
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 9:
When dividing 700 by 90, we get 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 3098.677
If we take 630 away from 700, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 3098.677 with a balance of 0.007.