34863816 divided by 90 
The aim is to understand the frequency of 90 in 34863816.

On to step 1:
When dividing 3 by 90, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 90

Step 2:
The number 90 fits into 34 0 times, leaving a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 34 and we're left with 34.
Append the next digit (8) from the dividend to 34 and continue with: 348 / 90

Moving on to step 3:
When dividing 348 by 90, we get 3 with a remainder of 78.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 270 from 348 leaves us with 78.
Include the next digit (6) from the dividend after 78, then repeat: 786 / 90

Advancing to step 4:
90 can be fit into 786 8 times, resulting in a remainder of 66.
Put 8 as the next digit of the answer. 
Result so far: 38.0
Subtract 720 from 786 to get 66.
Include the next digit (3) from the dividend after 66, then repeat: 663 / 90

Going ahead to step 5:
663 divided by 90 is 7 with a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 387.0
If we take 630 away from 663, we end up with 33.
Append the next digit (8) from the dividend to 33 and continue with: 338 / 90

Advancing to step 6:
If we divide 338 by 90, we get 3 and a remainder of 68.
The number 3 becomes the next digit in our result. 
Result so far: 3873.0
Subtract 270 from 338 to get 68.
Take the next digit (1) from the dividend and append it to 68, then repeat: 681 / 90

Step 7:
681 divided by 90 is 7 with a remainder of 51.
Record the quotient 7 as the next digit in the result. 
Result so far: 38737.0
Deduct 630 from 681 and we're left with 51.
Take the next digit (6) from the dividend and append it to 51, then repeat: 516 / 90

On to step 8:
516 divided by 90 is 5 with a remainder of 66.
Use 5 as the next digit of our solution. 
Result so far: 387375.0
Deduct 450 from 516 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 9:
If we divide 660 by 90, we get 7 and a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 387375.7
Deduct 630 from 660 and we're left 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 10:
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: 387375.73
The remainder is 30 after subtracting 270 from 300.
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 11:
90 goes into 300 3 times with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 387375.733
The remainder is 30 after subtracting 270 from 300.
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 387375.733, with a leftover of 0.003.