97421014 ÷ 509 
The aim is to understand the frequency of 509 in 97421014.

Step 1:
When dividing 9 by 509, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 509

Step 2:
When dividing 97 by 509, we get 0 with a remainder of 97.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 97 and we're left with 97.
Fetch the next digit (4) from the dividend, attach it to 97 and continue: 974 / 509

Advancing to step 3:
974 divided by 509 is 1 with a remainder of 465.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 509 from 974 and we're left with 465.
Grab the next digit (2) from the dividend, add it to 465, then carry on: 4652 / 509

Let's proceed to step 4:
509 can be fit into 4652 9 times, resulting in a remainder of 71.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Deduct 4581 from 4652 and we're left with 71.
Grab the next digit (1) from the dividend, add it to 71, then carry on: 711 / 509

Moving on to step 5:
509 can be fit into 711 1 times, resulting in a remainder of 202.
Put 1 as the next digit of the answer. 
Result so far: 191.0
Subtract 509 from 711 to get 202.
Take the next digit (0) from the dividend and append it to 202, then repeat: 2020 / 509

On to step 6:
When dividing 2020 by 509, we get 3 with a remainder of 493.
Write down 3 as next digit of the result. 
Result so far: 1913.0
Deduct 1527 from 2020 and we're left with 493.
Grab the next digit (1) from the dividend, add it to 493, then carry on: 4931 / 509

Going ahead to step 7:
509 can be fit into 4931 9 times, resulting in a remainder of 350.
Use 9 as the next digit of our solution. 
Result so far: 19139.0
Subtracting 4581 from 4931 leaves us with 350.
Fetch the next digit (4) from the dividend, attach it to 350 and continue: 3504 / 509

Let's proceed to step 8:
509 can be fit into 3504 6 times, resulting in a remainder of 450.
The next digit of our result is 6. 
Result so far: 191396.0
The remainder is 450 after subtracting 3054 from 3504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Going ahead to step 9:
509 can be fit into 4500 8 times, resulting in a remainder of 428.
Write down 8 as next digit of the result. 
Result so far: 191396.8
Subtract 4072 from 4500 to get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Step 10:
4280 divided by 509 is 8 with a remainder of 208.
The number 8 becomes the next digit in our result. 
Result so far: 191396.88
Subtracting 4072 from 4280 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

After the division, we end up with 191396.88 and a remainder of 0.208.