We divide 72186689 by 509
The aim is to understand the frequency of 509 in 72186689.

Moving on to step 1:
7 divided by 509 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 509

Going ahead to step 2:
If we divide 72 by 509, we get 0 and a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Fetch the next digit (1) from the dividend, attach it to 72 and continue: 721 / 509

Going ahead to step 3:
509 goes into 721 1 times with a remainder of 212.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 509 from 721, we get 212.
Append the next digit (8) from the dividend to 212 and continue with: 2128 / 509

Advancing to step 4:
If we divide 2128 by 509, we get 4 and a remainder of 92.
The next digit of our result is 4. 
Result so far: 14.0
Deduct 2036 from 2128 and we're left with 92.
Bring next digit (6) of the dividend behind the 92 and repeat the process: 926 / 509

Let's proceed to step 5:
509 can be fit into 926 1 times, resulting in a remainder of 417.
Use 1 as the next digit of our solution. 
Result so far: 141.0
If we take 509 away from 926, we end up with 417.
Fetch the next digit (6) from the dividend, attach it to 417 and continue: 4176 / 509

Step 6:
The number 509 fits into 4176 8 times, leaving a remainder of 104.
Record the quotient 8 as the next digit in the result. 
Result so far: 1418.0
Deduct 4072 from 4176 and we're left with 104.
Fetch the next digit (8) from the dividend, attach it to 104 and continue: 1048 / 509

Let's proceed to step 7:
509 goes into 1048 2 times with a remainder of 30.
Write down 2 as next digit of the result. 
Result so far: 14182.0
Subtract 1018 from 1048 to get 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 509

On to step 8:
If we divide 309 by 509, we get 0 and a remainder of 309.
Write down 0 as next digit of the result. 
Result so far: 141820.0
The remainder is 309 after subtracting 0 from 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Step 9:
3090 divided by 509 is 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 141820.6
If we subtract 3054 from 3090, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 10:
509 can be fit into 360 0 times, resulting in a remainder of 360.
The next digit of our result is 0. 
Result so far: 141820.6
Subtract 0 from 360 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 11:
If we divide 3600 by 509, we get 7 and a remainder of 37.
Use 7 as the next digit of our solution. 
Result so far: 141820.607
If we subtract 3563 from 3600, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 12:
509 goes into 370 0 times with a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 141820.607
The remainder is 370 after subtracting 0 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 13:
When dividing 3700 by 509, we get 7 with a remainder of 137.
The number 7 becomes the next digit in our result. 
Result so far: 141820.60707
Subtract 3563 from 3700 to get 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 14:
509 can be fit into 1370 2 times, resulting in a remainder of 352.
Use 2 as the next digit of our solution. 
Result so far: 141820.607072
If we subtract 1018 from 1370, we get 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Let's proceed to step 15:
509 goes into 3520 6 times with a remainder of 466.
Put 6 as the next digit of the answer. 
Result so far: 141820.6070726
Subtract 3054 from 3520 to get 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Step 16:
When dividing 4660 by 509, we get 9 with a remainder of 79.
Put 9 as the next digit of the answer. 
Result so far: 141820.60707269
Subtracting 4581 from 4660 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

In conclusion, the division gives 141820.60707269 with a balance of 7.9e-08.