521560 ÷ 384 
The aim is to understand the frequency of 384 in 521560.

Let's proceed to step 1:
If we divide 5 by 384, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 384

Advancing to step 2:
When dividing 52 by 384, we get 0 with a remainder of 52.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 52 to get 52.
Take the next digit (1) from the dividend and append it to 52, then repeat: 521 / 384

Moving on to step 3:
384 can be fit into 521 1 times, resulting in a remainder of 137.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 384 from 521 to get 137.
Fetch the next digit (5) from the dividend, attach it to 137 and continue: 1375 / 384

Let's proceed to step 4:
384 can be fit into 1375 3 times, resulting in a remainder of 223.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 1152 away from 1375, we end up with 223.
Bring next digit (6) of the dividend behind the 223 and repeat the process: 2236 / 384

Moving on to step 5:
2236 divided by 384 is 5 with a remainder of 316.
The number 5 becomes the next digit in our result. 
Result so far: 135.0
Subtracting 1920 from 2236 leaves us with 316.
Append the next digit (0) from the dividend to 316 and continue with: 3160 / 384

On to step 6:
The number 384 fits into 3160 8 times, leaving a remainder of 88.
Put 8 as the next digit of the answer. 
Result so far: 1358.0
The remainder is 88 after subtracting 3072 from 3160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 7:
When dividing 880 by 384, we get 2 with a remainder of 112.
Record the quotient 2 as the next digit in the result. 
Result so far: 1358.2
Subtract 768 from 880 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 8:
1120 divided by 384 is 2 with a remainder of 352.
The number 2 becomes the next digit in our result. 
Result so far: 1358.22
Subtracting 768 from 1120 leaves us with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

After the division, we end up with 1358.22 and a remainder of 0.352.