We're dividing 44404072 by 521 
The aim is to understand the frequency of 521 in 44404072.

On to step 1:
The number 521 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 521

On to step 2:
521 goes into 44 0 times with a remainder of 44.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 44, we get 44.
Include the next digit (4) from the dividend after 44, then repeat: 444 / 521

Advancing to step 3:
521 goes into 444 0 times with a remainder of 444.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 444 to get 444.
Take the next digit (0) from the dividend and append it to 444, then repeat: 4440 / 521

Step 4:
When dividing 4440 by 521, we get 8 with a remainder of 272.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 4168 from 4440, we get 272.
Fetch the next digit (4) from the dividend, attach it to 272 and continue: 2724 / 521

Moving on to step 5:
521 goes into 2724 5 times with a remainder of 119.
Use 5 as the next digit of our solution. 
Result so far: 85.0
Deduct 2605 from 2724 and we're left with 119.
Take the next digit (0) from the dividend and append it to 119, then repeat: 1190 / 521

Step 6:
When dividing 1190 by 521, we get 2 with a remainder of 148.
Write down 2 as next digit of the result. 
Result so far: 852.0
If we subtract 1042 from 1190, we get 148.
Fetch the next digit (7) from the dividend, attach it to 148 and continue: 1487 / 521

Step 7:
521 goes into 1487 2 times with a remainder of 445.
Record the quotient 2 as the next digit in the result. 
Result so far: 8522.0
Deduct 1042 from 1487 and we're left with 445.
Grab the next digit (2) from the dividend, add it to 445, then carry on: 4452 / 521

Step 8:
If we divide 4452 by 521, we get 8 and a remainder of 284.
Write down 8 as next digit of the result. 
Result so far: 85228.0
If we subtract 4168 from 4452, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

On to step 9:
When dividing 2840 by 521, we get 5 with a remainder of 235.
Write down 5 as next digit of the result. 
Result so far: 85228.5
The remainder is 235 after subtracting 2605 from 2840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Advancing to step 10:
The number 521 fits into 2350 4 times, leaving a remainder of 266.
Put 4 as the next digit of the answer. 
Result so far: 85228.54
If we subtract 2084 from 2350, we get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Advancing to step 11:
521 can be fit into 2660 5 times, resulting in a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 85228.545
Subtracting 2605 from 2660 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 12:
If we divide 550 by 521, we get 1 and a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 85228.5451
Subtracting 521 from 550 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 13:
521 can be fit into 290 0 times, resulting in a remainder of 290.
Record the quotient 0 as the next digit in the result. 
Result so far: 85228.5451
If we take 0 away from 290, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Moving on to step 14:
2900 divided by 521 is 5 with a remainder of 295.
Record the quotient 5 as the next digit in the result. 
Result so far: 85228.545105
If we subtract 2605 from 2900, we get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Let's proceed to step 15:
If we divide 2950 by 521, we get 5 and a remainder of 345.
The number 5 becomes the next digit in our result. 
Result so far: 85228.5451055
Subtracting 2605 from 2950 leaves us with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Our division results in 85228.5451055 with a remaining 3.45e-06.