58721576 ÷ 578 
The aim is to understand the frequency of 578 in 58721576.

On to step 1:
When dividing 5 by 578, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 578

On to step 2:
When dividing 58 by 578, we get 0 with a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 58 leaves us with 58.
Fetch the next digit (7) from the dividend, attach it to 58 and continue: 587 / 578

Let's proceed to step 3:
The number 578 fits into 587 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 578 away from 587, we end up with 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 578

Let's proceed to step 4:
578 goes into 92 0 times with a remainder of 92.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 92 and we're left with 92.
Grab the next digit (1) from the dividend, add it to 92, then carry on: 921 / 578

Moving on to step 5:
If we divide 921 by 578, we get 1 and a remainder of 343.
Use 1 as the next digit of our solution. 
Result so far: 101.0
If we subtract 578 from 921, we get 343.
Bring next digit (5) of the dividend behind the 343 and repeat the process: 3435 / 578

Let's proceed to step 6:
578 goes into 3435 5 times with a remainder of 545.
The next digit of our result is 5. 
Result so far: 1015.0
If we subtract 2890 from 3435, we get 545.
Take the next digit (7) from the dividend and append it to 545, then repeat: 5457 / 578

Going ahead to step 7:
When dividing 5457 by 578, we get 9 with a remainder of 255.
Record the quotient 9 as the next digit in the result. 
Result so far: 10159.0
The remainder is 255 after subtracting 5202 from 5457.
Take the next digit (6) from the dividend and append it to 255, then repeat: 2556 / 578

Step 8:
2556 divided by 578 is 4 with a remainder of 244.
Write down 4 as next digit of the result. 
Result so far: 101594.0
The remainder is 244 after subtracting 2312 from 2556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Advancing to step 9:
If we divide 2440 by 578, we get 4 and a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 101594.4
If we subtract 2312 from 2440, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 10:
When dividing 1280 by 578, we get 2 with a remainder of 124.
Use 2 as the next digit of our solution. 
Result so far: 101594.42
Subtracting 1156 from 1280 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Moving on to step 11:
578 can be fit into 1240 2 times, resulting in a remainder of 84.
Put 2 as the next digit of the answer. 
Result so far: 101594.422
If we subtract 1156 from 1240, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The quotient of the division is 101594.422, and the remainder is 0.0084.