Let's divide 90454693 by 28
The aim is to understand the frequency of 28 in 90454693.

Advancing to step 1:
9 divided by 28 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 28

Going ahead to step 2:
If we divide 90 by 28, we get 3 and a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 84 from 90 leaves us with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 28

Going ahead to step 3:
When dividing 64 by 28, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
If we subtract 56 from 64, we get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 28

On to step 4:
When dividing 85 by 28, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 323.0
If we subtract 84 from 85, we get 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 28

Going ahead to step 5:
When dividing 14 by 28, we get 0 with a remainder of 14.
The next digit of our result is 0. 
Result so far: 3230.0
The remainder is 14 after subtracting 0 from 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 28

Moving on to step 6:
146 divided by 28 is 5 with a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 32305.0
If we subtract 140 from 146, we get 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 28

Step 7:
69 divided by 28 is 2 with a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 323052.0
Subtracting 56 from 69 leaves us with 13.
Bring next digit (3) of the dividend behind the 13 and repeat the process: 133 / 28

Let's proceed to step 8:
28 can be fit into 133 4 times, resulting in a remainder of 21.
Write down 4 as next digit of the result. 
Result so far: 3230524.0
If we take 112 away from 133, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
28 goes into 210 7 times with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 3230524.7
Subtract 196 from 210 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 10:
If we divide 140 by 28, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 3230524.75
Subtracting 140 from 140 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 11:
28 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3230524.75
Deduct 0 from 0 and we're left 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 12:
When dividing 0 by 28, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3230524.75
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.

The final outcome is 3230524.75, with a leftover of 0.0.