We look at the division of 448404 by 7 
The aim is to understand the frequency of 7 in 448404.

Let's proceed to step 1:
If we divide 4 by 7, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 7

On to step 2:
7 goes into 44 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 42 from 44, we get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 7

Moving on to step 3:
28 divided by 7 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
The remainder is 0 after subtracting 28 from 28.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 7

Step 4:
When dividing 4 by 7, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 640.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 7

Moving on to step 5:
7 can be fit into 40 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 6405.0
Subtract 35 from 40 to get 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 7

Step 6:
7 goes into 54 7 times with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 64057.0
The remainder is 5 after subtracting 49 from 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
When dividing 50 by 7, we get 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 64057.7
Subtract 49 from 50 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
The number 7 fits into 10 1 times, leaving a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 64057.71
If we subtract 7 from 10, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
7 can be fit into 30 4 times, resulting in a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 64057.714
Deduct 28 from 30 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
20 divided by 7 is 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 64057.7142
If we subtract 14 from 20, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
7 can be fit into 60 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 64057.71428
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 12:
40 divided by 7 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 64057.714285
Subtracting 35 from 40 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 13:
7 goes into 50 7 times with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 64057.7142857
The remainder is 1 after subtracting 49 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 14:
7 goes into 10 1 times with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 64057.71428571
If we take 7 away from 10, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

In conclusion, the division gives 64057.71428571 with a balance of 3e-09.