548970 divided by 90 
The aim is to understand the frequency of 90 in 548970.

Let's proceed to step 1:
The number 90 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 90

Advancing to step 2:
54 divided by 90 is 0 with a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Include the next digit (8) from the dividend after 54, then repeat: 548 / 90

Moving on to step 3:
90 goes into 548 6 times with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 540 away from 548, we end up with 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 90

Advancing to step 4:
90 goes into 89 0 times with a remainder of 89.
Record the quotient 0 as the next digit in the result. 
Result so far: 60.0
If we subtract 0 from 89, we get 89.
Include the next digit (7) from the dividend after 89, then repeat: 897 / 90

Let's proceed to step 5:
90 can be fit into 897 9 times, resulting in a remainder of 87.
Record the quotient 9 as the next digit in the result. 
Result so far: 609.0
If we subtract 810 from 897, we get 87.
Append the next digit (0) from the dividend to 87 and continue with: 870 / 90

Moving on to step 6:
The number 90 fits into 870 9 times, leaving a remainder of 60.
Put 9 as the next digit of the answer. 
Result so far: 6099.0
The remainder is 60 after subtracting 810 from 870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 7:
600 divided by 90 is 6 with a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 6099.6
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
90 goes into 600 6 times with a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 6099.66
Subtract 540 from 600 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

In conclusion, the division gives 6099.66 with a balance of 0.06.