We look at the division of 33504660 by 509 
The aim is to understand the frequency of 509 in 33504660.

Going ahead to step 1:
509 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 509

On to step 2:
509 can be fit into 33 0 times, resulting in a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 33, we end up with 33.
Grab the next digit (5) from the dividend, add it to 33, then carry on: 335 / 509

Advancing to step 3:
The number 509 fits into 335 0 times, leaving a remainder of 335.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 335 to get 335.
Bring next digit (0) of the dividend behind the 335 and repeat the process: 3350 / 509

On to step 4:
509 can be fit into 3350 6 times, resulting in a remainder of 296.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 3054 from 3350 leaves us with 296.
Append the next digit (4) from the dividend to 296 and continue with: 2964 / 509

Going ahead to step 5:
509 goes into 2964 5 times with a remainder of 419.
Put 5 as the next digit of the answer. 
Result so far: 65.0
Deduct 2545 from 2964 and we're left with 419.
Grab the next digit (6) from the dividend, add it to 419, then carry on: 4196 / 509

Moving on to step 6:
509 can be fit into 4196 8 times, resulting in a remainder of 124.
Record the quotient 8 as the next digit in the result. 
Result so far: 658.0
Deduct 4072 from 4196 and we're left with 124.
Grab the next digit (6) from the dividend, add it to 124, then carry on: 1246 / 509

Going ahead to step 7:
If we divide 1246 by 509, we get 2 and a remainder of 228.
The next digit of our result is 2. 
Result so far: 6582.0
Subtract 1018 from 1246 to get 228.
Append the next digit (0) from the dividend to 228 and continue with: 2280 / 509

Moving on to step 8:
509 can be fit into 2280 4 times, resulting in a remainder of 244.
Write down 4 as next digit of the result. 
Result so far: 65824.0
Subtract 2036 from 2280 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Moving on to step 9:
When dividing 2440 by 509, we get 4 with a remainder of 404.
Put 4 as the next digit of the answer. 
Result so far: 65824.4
If we subtract 2036 from 2440, we get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 10:
4040 divided by 509 is 7 with a remainder of 477.
The next digit of our result is 7. 
Result so far: 65824.47
If we subtract 3563 from 4040, we get 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Moving on to step 11:
4770 divided by 509 is 9 with a remainder of 189.
Write down 9 as next digit of the result. 
Result so far: 65824.479
The remainder is 189 after subtracting 4581 from 4770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Moving on to step 12:
509 can be fit into 1890 3 times, resulting in a remainder of 363.
Use 3 as the next digit of our solution. 
Result so far: 65824.4793
Subtract 1527 from 1890 to get 363.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

On to step 13:
If we divide 3630 by 509, we get 7 and a remainder of 67.
The number 7 becomes the next digit in our result. 
Result so far: 65824.47937
Subtracting 3563 from 3630 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 14:
509 can be fit into 670 1 times, resulting in a remainder of 161.
Use 1 as the next digit of our solution. 
Result so far: 65824.479371
Deduct 509 from 670 and we're left with 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Step 15:
1610 divided by 509 is 3 with a remainder of 83.
Use 3 as the next digit of our solution. 
Result so far: 65824.4793713
The remainder is 83 after subtracting 1527 from 1610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 16:
509 goes into 830 1 times with a remainder of 321.
Record the quotient 1 as the next digit in the result. 
Result so far: 65824.47937131
Subtracting 509 from 830 leaves us with 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

The final outcome is 65824.47937131, with a leftover of 3.21e-07.