We're dividing 1390852 by 448 
The aim is to understand the frequency of 448 in 1390852.

Let's proceed to step 1:
If we divide 1 by 448, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 448

Going ahead to step 2:
448 can be fit into 13 0 times, resulting in a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 448

Step 3:
448 can be fit into 139 0 times, resulting in a remainder of 139.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 139, we get 139.
Fetch the next digit (0) from the dividend, attach it to 139 and continue: 1390 / 448

Step 4:
448 goes into 1390 3 times with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 46 after subtracting 1344 from 1390.
Include the next digit (8) from the dividend after 46, then repeat: 468 / 448

Let's proceed to step 5:
When dividing 468 by 448, we get 1 with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 31.0
The remainder is 20 after subtracting 448 from 468.
Fetch the next digit (5) from the dividend, attach it to 20 and continue: 205 / 448

Let's proceed to step 6:
If we divide 205 by 448, we get 0 and a remainder of 205.
The next digit of our result is 0. 
Result so far: 310.0
If we subtract 0 from 205, we get 205.
Take the next digit (2) from the dividend and append it to 205, then repeat: 2052 / 448

Going ahead to step 7:
448 goes into 2052 4 times with a remainder of 260.
Write down 4 as next digit of the result. 
Result so far: 3104.0
If we subtract 1792 from 2052, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Step 8:
448 goes into 2600 5 times with a remainder of 360.
The next digit of our result is 5. 
Result so far: 3104.5
Subtract 2240 from 2600 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 9:
448 can be fit into 3600 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 3104.58
The remainder is 16 after subtracting 3584 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 10:
The number 448 fits into 160 0 times, leaving a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 3104.58
Subtract 0 from 160 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 11:
448 can be fit into 1600 3 times, resulting in a remainder of 256.
The number 3 becomes the next digit in our result. 
Result so far: 3104.5803
The remainder is 256 after subtracting 1344 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 12:
The number 448 fits into 2560 5 times, leaving a remainder of 320.
The number 5 becomes the next digit in our result. 
Result so far: 3104.58035
Deduct 2240 from 2560 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 13:
448 goes into 3200 7 times with a remainder of 64.
Put 7 as the next digit of the answer. 
Result so far: 3104.580357
If we subtract 3136 from 3200, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 14:
448 goes into 640 1 times with a remainder of 192.
Put 1 as the next digit of the answer. 
Result so far: 3104.5803571
Subtract 448 from 640 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 15:
If we divide 1920 by 448, we get 4 and a remainder of 128.
Record the quotient 4 as the next digit in the result. 
Result so far: 3104.58035714
Subtract 1792 from 1920 to 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.

The final result is 3104.58035714 with a remainder of 1.28e-07.