891231 divided by 30 
The aim is to understand the frequency of 30 in 891231.

Let's proceed to step 1:
When dividing 8 by 30, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 30

Advancing to step 2:
The number 30 fits into 89 2 times, leaving a remainder of 29.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 60 from 89 and we're left with 29.
Bring next digit (1) of the dividend behind the 29 and repeat the process: 291 / 30

Going ahead to step 3:
When dividing 291 by 30, we get 9 with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 29.0
Subtracting 270 from 291 leaves us with 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 30

Advancing to step 4:
If we divide 212 by 30, we get 7 and a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 297.0
If we subtract 210 from 212, we get 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 30

Step 5:
When dividing 23 by 30, we get 0 with a remainder of 23.
The next digit of our result is 0. 
Result so far: 2970.0
Subtract 0 from 23 to get 23.
Bring next digit (1) of the dividend behind the 23 and repeat the process: 231 / 30

Step 6:
When dividing 231 by 30, we get 7 with a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 29707.0
Subtract 210 from 231 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 7:
When dividing 210 by 30, we get 7 with a remainder of 0.
The next digit of our result is 7. 
Result so far: 29707.7
Subtracting 210 from 210 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
0 divided by 30 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 29707.7
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
0 divided by 30 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 29707.7
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 29707.7, and the remainder is 0.0.