Let's divide 256357 by 30
The aim is to understand the frequency of 30 in 256357.

On to step 1:
When dividing 2 by 30, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 30

Step 2:
30 can be fit into 25 0 times, resulting in a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Append the next digit (6) from the dividend to 25 and continue with: 256 / 30

Advancing to step 3:
256 divided by 30 is 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 240 from 256 to get 16.
Grab the next digit (3) from the dividend, add it to 16, then carry on: 163 / 30

Going ahead to step 4:
30 goes into 163 5 times with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 85.0
The remainder is 13 after subtracting 150 from 163.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 30

Advancing to step 5:
The number 30 fits into 135 4 times, leaving a remainder of 15.
The number 4 becomes the next digit in our result. 
Result so far: 854.0
Deduct 120 from 135 and we're left with 15.
Append the next digit (7) from the dividend to 15 and continue with: 157 / 30

Moving on to step 6:
When dividing 157 by 30, we get 5 with a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 8545.0
Subtract 150 from 157 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
30 can be fit into 70 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 8545.2
Subtract 60 from 70 to 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.

Moving on to step 8:
The number 30 fits into 100 3 times, leaving a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 8545.23
Subtract 90 from 100 to 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.

Advancing to step 9:
30 goes into 100 3 times with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 8545.233
If we take 90 away from 100, 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.

The final outcome is 8545.233, with a leftover of 0.001.