53828839 ÷ 390 
The aim is to understand the frequency of 390 in 53828839.

Step 1:
5 divided by 390 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 390

Let's proceed to step 2:
53 divided by 390 is 0 with a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Append the next digit (8) from the dividend to 53 and continue with: 538 / 390

Step 3:
538 divided by 390 is 1 with a remainder of 148.
The next digit of our result is 1. 
Result so far: 1.0
If we take 390 away from 538, we end up with 148.
Grab the next digit (2) from the dividend, add it to 148, then carry on: 1482 / 390

Moving on to step 4:
When dividing 1482 by 390, we get 3 with a remainder of 312.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 1170 from 1482, we get 312.
Bring next digit (8) of the dividend behind the 312 and repeat the process: 3128 / 390

On to step 5:
3128 divided by 390 is 8 with a remainder of 8.
The next digit of our result is 8. 
Result so far: 138.0
The remainder is 8 after subtracting 3120 from 3128.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 390

Moving on to step 6:
390 can be fit into 88 0 times, resulting in a remainder of 88.
Use 0 as the next digit of our solution. 
Result so far: 1380.0
Deduct 0 from 88 and we're left with 88.
Include the next digit (3) from the dividend after 88, then repeat: 883 / 390

Going ahead to step 7:
390 goes into 883 2 times with a remainder of 103.
Put 2 as the next digit of the answer. 
Result so far: 13802.0
Deduct 780 from 883 and we're left with 103.
Bring next digit (9) of the dividend behind the 103 and repeat the process: 1039 / 390

On to step 8:
390 can be fit into 1039 2 times, resulting in a remainder of 259.
The next digit of our result is 2. 
Result so far: 138022.0
If we subtract 780 from 1039, we get 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Going ahead to step 9:
390 can be fit into 2590 6 times, resulting in a remainder of 250.
The number 6 becomes the next digit in our result. 
Result so far: 138022.6
If we subtract 2340 from 2590, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Advancing to step 10:
2500 divided by 390 is 6 with a remainder of 160.
Record the quotient 6 as the next digit in the result. 
Result so far: 138022.66
If we take 2340 away from 2500, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

The quotient of the division is 138022.66, and the remainder is 0.16.