We look at the division of 39889274 by 90 
The aim is to understand the frequency of 90 in 39889274.

Advancing to step 1:
3 divided by 90 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 90

Step 2:
39 divided by 90 is 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Take the next digit (8) from the dividend and append it to 39, then repeat: 398 / 90

Step 3:
398 divided by 90 is 4 with a remainder of 38.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 360 from 398 to get 38.
Append the next digit (8) from the dividend to 38 and continue with: 388 / 90

On to step 4:
90 goes into 388 4 times with a remainder of 28.
Write down 4 as next digit of the result. 
Result so far: 44.0
Deduct 360 from 388 and we're left with 28.
Fetch the next digit (9) from the dividend, attach it to 28 and continue: 289 / 90

Going ahead to step 5:
90 can be fit into 289 3 times, resulting in a remainder of 19.
Write down 3 as next digit of the result. 
Result so far: 443.0
If we subtract 270 from 289, we get 19.
Bring next digit (2) of the dividend behind the 19 and repeat the process: 192 / 90

Advancing to step 6:
When dividing 192 by 90, we get 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 4432.0
Subtract 180 from 192 to get 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 90

Step 7:
90 goes into 127 1 times with a remainder of 37.
The next digit of our result is 1. 
Result so far: 44321.0
If we take 90 away from 127, we end up with 37.
Append the next digit (4) from the dividend to 37 and continue with: 374 / 90

Going ahead to step 8:
90 goes into 374 4 times with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 443214.0
If we subtract 360 from 374, we 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.

Moving on to step 9:
If we divide 140 by 90, we get 1 and a remainder of 50.
Write down 1 as next digit of the result. 
Result so far: 443214.1
Subtracting 90 from 140 leaves us 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.

Advancing to step 10:
90 can be fit into 500 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 443214.15
If we subtract 450 from 500, we get 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 11:
90 can be fit into 500 5 times, resulting in a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 443214.155
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

In conclusion, the division gives 443214.155 with a balance of 0.005.