491385 ÷ 51 
The aim is to understand the frequency of 51 in 491385.

Advancing to step 1:
4 divided by 51 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 51

Moving on to step 2:
51 goes into 49 0 times with a remainder of 49.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 49, we end up with 49.
Grab the next digit (1) from the dividend, add it to 49, then carry on: 491 / 51

Going ahead to step 3:
If we divide 491 by 51, we get 9 and a remainder of 32.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 459 from 491 leaves us with 32.
Take the next digit (3) from the dividend and append it to 32, then repeat: 323 / 51

Let's proceed to step 4:
When dividing 323 by 51, we get 6 with a remainder of 17.
Write down 6 as next digit of the result. 
Result so far: 96.0
If we subtract 306 from 323, we get 17.
Fetch the next digit (8) from the dividend, attach it to 17 and continue: 178 / 51

Going ahead to step 5:
When dividing 178 by 51, we get 3 with a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 963.0
Deduct 153 from 178 and we're left with 25.
Take the next digit (5) from the dividend and append it to 25, then repeat: 255 / 51

Step 6:
51 goes into 255 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 9635.0
Deduct 255 from 255 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.

Step 7:
The number 51 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9635.0
If we take 0 away from 0, we end up 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.

Going ahead to step 8:
The number 51 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 9635.0
If we take 0 away from 0, we end up 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.

In conclusion, the division gives 9635.0 with a balance of 0.0.