We're dividing 90009540 by 381 
The aim is to understand the frequency of 381 in 90009540.

On to step 1:
381 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 381

Advancing to step 2:
If we divide 90 by 381, we get 0 and a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Fetch the next digit (0) from the dividend, attach it to 90 and continue: 900 / 381

On to step 3:
381 goes into 900 2 times with a remainder of 138.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 138 after subtracting 762 from 900.
Append the next digit (0) from the dividend to 138 and continue with: 1380 / 381

Let's proceed to step 4:
381 goes into 1380 3 times with a remainder of 237.
Write down 3 as next digit of the result. 
Result so far: 23.0
If we subtract 1143 from 1380, we get 237.
Bring next digit (9) of the dividend behind the 237 and repeat the process: 2379 / 381

Going ahead to step 5:
When dividing 2379 by 381, we get 6 with a remainder of 93.
Record the quotient 6 as the next digit in the result. 
Result so far: 236.0
If we subtract 2286 from 2379, we get 93.
Take the next digit (5) from the dividend and append it to 93, then repeat: 935 / 381

Advancing to step 6:
381 goes into 935 2 times with a remainder of 173.
Use 2 as the next digit of our solution. 
Result so far: 2362.0
Deduct 762 from 935 and we're left with 173.
Take the next digit (4) from the dividend and append it to 173, then repeat: 1734 / 381

Advancing to step 7:
1734 divided by 381 is 4 with a remainder of 210.
Record the quotient 4 as the next digit in the result. 
Result so far: 23624.0
Deduct 1524 from 1734 and we're left with 210.
Take the next digit (0) from the dividend and append it to 210, then repeat: 2100 / 381

Step 8:
The number 381 fits into 2100 5 times, leaving a remainder of 195.
The next digit of our result is 5. 
Result so far: 236245.0
If we take 1905 away from 2100, we end up with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 9:
1950 divided by 381 is 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 236245.5
The remainder is 45 after subtracting 1905 from 1950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 10:
381 can be fit into 450 1 times, resulting in a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 236245.51
If we take 381 away from 450, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 11:
When dividing 690 by 381, we get 1 with a remainder of 309.
Write down 1 as next digit of the result. 
Result so far: 236245.511
Deduct 381 from 690 and we're left with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

The final result is 236245.511 with a remainder of 0.0309.