401806 divided by 30 
The aim is to understand the frequency of 30 in 401806.

Going ahead to step 1:
30 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 30

Going ahead to step 2:
If we divide 40 by 30, we get 1 and a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 30 from 40, we get 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 30

Going ahead to step 3:
If we divide 101 by 30, we get 3 and a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 11 after subtracting 90 from 101.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 30

Advancing to step 4:
30 goes into 118 3 times with a remainder of 28.
The next digit of our result is 3. 
Result so far: 133.0
The remainder is 28 after subtracting 90 from 118.
Append the next digit (0) from the dividend to 28 and continue with: 280 / 30

Moving on to step 5:
The number 30 fits into 280 9 times, leaving a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 1339.0
If we subtract 270 from 280, we get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 30

Let's proceed to step 6:
When dividing 106 by 30, we get 3 with a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 13393.0
If we take 90 away from 106, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 7:
When dividing 160 by 30, we get 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 13393.5
If we take 150 away from 160, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 30 fits into 100 3 times, leaving a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 13393.53
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
100 divided by 30 is 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 13393.533
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 13393.533 and a remainder of 0.001.