79770452 ÷ 509 
The aim is to understand the frequency of 509 in 79770452.

Going ahead to step 1:
509 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 509

Advancing to step 2:
When dividing 79 by 509, we get 0 with a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 79 and we're left with 79.
Take the next digit (7) from the dividend and append it to 79, then repeat: 797 / 509

On to step 3:
509 can be fit into 797 1 times, resulting in a remainder of 288.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 509 from 797 to get 288.
Grab the next digit (7) from the dividend, add it to 288, then carry on: 2887 / 509

Moving on to step 4:
2887 divided by 509 is 5 with a remainder of 342.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 2545 from 2887 leaves us with 342.
Fetch the next digit (0) from the dividend, attach it to 342 and continue: 3420 / 509

Let's proceed to step 5:
If we divide 3420 by 509, we get 6 and a remainder of 366.
Use 6 as the next digit of our solution. 
Result so far: 156.0
Subtracting 3054 from 3420 leaves us with 366.
Fetch the next digit (4) from the dividend, attach it to 366 and continue: 3664 / 509

Let's proceed to step 6:
509 goes into 3664 7 times with a remainder of 101.
Use 7 as the next digit of our solution. 
Result so far: 1567.0
Subtract 3563 from 3664 to get 101.
Include the next digit (5) from the dividend after 101, then repeat: 1015 / 509

Advancing to step 7:
If we divide 1015 by 509, we get 1 and a remainder of 506.
The next digit of our result is 1. 
Result so far: 15671.0
The remainder is 506 after subtracting 509 from 1015.
Fetch the next digit (2) from the dividend, attach it to 506 and continue: 5062 / 509

Advancing to step 8:
If we divide 5062 by 509, we get 9 and a remainder of 481.
Record the quotient 9 as the next digit in the result. 
Result so far: 156719.0
Deduct 4581 from 5062 and we're left with 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

Step 9:
When dividing 4810 by 509, we get 9 with a remainder of 229.
Write down 9 as next digit of the result. 
Result so far: 156719.9
Deduct 4581 from 4810 and we're left with 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Advancing to step 10:
When dividing 2290 by 509, we get 4 with a remainder of 254.
Write down 4 as next digit of the result. 
Result so far: 156719.94
Deduct 2036 from 2290 and we're left with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Moving on to step 11:
2540 divided by 509 is 4 with a remainder of 504.
Write down 4 as next digit of the result. 
Result so far: 156719.944
Subtracting 2036 from 2540 leaves us with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

The final outcome is 156719.944, with a leftover of 0.0504.