We're dividing 40444089 by 391 
The aim is to understand the frequency of 391 in 40444089.

Step 1:
When dividing 4 by 391, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 391

Moving on to step 2:
391 can be fit into 40 0 times, resulting in a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Bring next digit (4) of the dividend behind the 40 and repeat the process: 404 / 391

Step 3:
The number 391 fits into 404 1 times, leaving a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 13 after subtracting 391 from 404.
Fetch the next digit (4) from the dividend, attach it to 13 and continue: 134 / 391

Going ahead to step 4:
391 can be fit into 134 0 times, resulting in a remainder of 134.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 134 and we're left with 134.
Grab the next digit (4) from the dividend, add it to 134, then carry on: 1344 / 391

Advancing to step 5:
1344 divided by 391 is 3 with a remainder of 171.
Record the quotient 3 as the next digit in the result. 
Result so far: 103.0
The remainder is 171 after subtracting 1173 from 1344.
Fetch the next digit (0) from the dividend, attach it to 171 and continue: 1710 / 391

Going ahead to step 6:
1710 divided by 391 is 4 with a remainder of 146.
Write down 4 as next digit of the result. 
Result so far: 1034.0
If we subtract 1564 from 1710, we get 146.
Fetch the next digit (8) from the dividend, attach it to 146 and continue: 1468 / 391

Going ahead to step 7:
391 goes into 1468 3 times with a remainder of 295.
Record the quotient 3 as the next digit in the result. 
Result so far: 10343.0
The remainder is 295 after subtracting 1173 from 1468.
Take the next digit (9) from the dividend and append it to 295, then repeat: 2959 / 391

Advancing to step 8:
391 goes into 2959 7 times with a remainder of 222.
Use 7 as the next digit of our solution. 
Result so far: 103437.0
If we subtract 2737 from 2959, we get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Moving on to step 9:
2220 divided by 391 is 5 with a remainder of 265.
Write down 5 as next digit of the result. 
Result so far: 103437.5
Subtract 1955 from 2220 to get 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Let's proceed to step 10:
391 goes into 2650 6 times with a remainder of 304.
Write down 6 as next digit of the result. 
Result so far: 103437.56
The remainder is 304 after subtracting 2346 from 2650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Moving on to step 11:
The number 391 fits into 3040 7 times, leaving a remainder of 303.
Use 7 as the next digit of our solution. 
Result so far: 103437.567
If we subtract 2737 from 3040, we get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Advancing to step 12:
When dividing 3030 by 391, we get 7 with a remainder of 293.
The next digit of our result is 7. 
Result so far: 103437.5677
Subtract 2737 from 3030 to get 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

In conclusion, the division gives 103437.5677 with a balance of 0.00293.