685899 ÷ 30 
The aim is to understand the frequency of 30 in 685899.

Step 1:
If we divide 6 by 30, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 30

On to step 2:
When dividing 68 by 30, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 60 from 68 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 30

Moving on to step 3:
If we divide 85 by 30, we get 2 and a remainder of 25.
The next digit of our result is 2. 
Result so far: 22.0
The remainder is 25 after subtracting 60 from 85.
Append the next digit (8) from the dividend to 25 and continue with: 258 / 30

Advancing to step 4:
The number 30 fits into 258 8 times, leaving a remainder of 18.
The next digit of our result is 8. 
Result so far: 228.0
Deduct 240 from 258 and we're left with 18.
Grab the next digit (9) from the dividend, add it to 18, then carry on: 189 / 30

Let's proceed to step 5:
30 goes into 189 6 times with a remainder of 9.
The next digit of our result is 6. 
Result so far: 2286.0
Subtracting 180 from 189 leaves us with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 30

Advancing to step 6:
99 divided by 30 is 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 22863.0
Subtracting 90 from 99 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
If we divide 90 by 30, we get 3 and a remainder of 0.
The next digit of our result is 3. 
Result so far: 22863.3
Deduct 90 from 90 and we're left 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.

Advancing to step 8:
The number 30 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 22863.3
Subtracting 0 from 0 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 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: 22863.3
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.

Our division results in 22863.3 with a remaining 0.0.