We look at the division of 44449946 by 578 
The aim is to understand the frequency of 578 in 44449946.

On to step 1:
4 divided by 578 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 578

On to step 2:
44 divided by 578 is 0 with a remainder of 44.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 44 and we're left with 44.
Include the next digit (4) from the dividend after 44, then repeat: 444 / 578

Advancing to step 3:
When dividing 444 by 578, we get 0 with a remainder of 444.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 444 after subtracting 0 from 444.
Include the next digit (4) from the dividend after 444, then repeat: 4444 / 578

On to step 4:
When dividing 4444 by 578, we get 7 with a remainder of 398.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 398 after subtracting 4046 from 4444.
Take the next digit (9) from the dividend and append it to 398, then repeat: 3989 / 578

On to step 5:
When dividing 3989 by 578, we get 6 with a remainder of 521.
Write down 6 as next digit of the result. 
Result so far: 76.0
If we take 3468 away from 3989, we end up with 521.
Append the next digit (9) from the dividend to 521 and continue with: 5219 / 578

Step 6:
The number 578 fits into 5219 9 times, leaving a remainder of 17.
Use 9 as the next digit of our solution. 
Result so far: 769.0
If we take 5202 away from 5219, we end up with 17.
Grab the next digit (4) from the dividend, add it to 17, then carry on: 174 / 578

On to step 7:
578 can be fit into 174 0 times, resulting in a remainder of 174.
Put 0 as the next digit of the answer. 
Result so far: 7690.0
Subtracting 0 from 174 leaves us with 174.
Append the next digit (6) from the dividend to 174 and continue with: 1746 / 578

Step 8:
578 can be fit into 1746 3 times, resulting in a remainder of 12.
Use 3 as the next digit of our solution. 
Result so far: 76903.0
The remainder is 12 after subtracting 1734 from 1746.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
When dividing 120 by 578, we get 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 76903.0
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 10:
578 goes into 1200 2 times with a remainder of 44.
Record the quotient 2 as the next digit in the result. 
Result so far: 76903.02
Subtract 1156 from 1200 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 11:
578 goes into 440 0 times with a remainder of 440.
Put 0 as the next digit of the answer. 
Result so far: 76903.02
Subtracting 0 from 440 leaves us with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Let's proceed to step 12:
4400 divided by 578 is 7 with a remainder of 354.
Record the quotient 7 as the next digit in the result. 
Result so far: 76903.0207
If we subtract 4046 from 4400, we get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Going ahead to step 13:
If we divide 3540 by 578, we get 6 and a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 76903.02076
Deduct 3468 from 3540 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 14:
If we divide 720 by 578, we get 1 and a remainder of 142.
Use 1 as the next digit of our solution. 
Result so far: 76903.020761
If we take 578 away from 720, we end up with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Advancing to step 15:
578 can be fit into 1420 2 times, resulting in a remainder of 264.
The number 2 becomes the next digit in our result. 
Result so far: 76903.0207612
If we take 1156 away from 1420, we end up with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Step 16:
578 goes into 2640 4 times with a remainder of 328.
Put 4 as the next digit of the answer. 
Result so far: 76903.02076124
Subtracting 2312 from 2640 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

The final result is 76903.02076124 with a remainder of 3.28e-07.