3409965 ÷ 800 
The aim is to understand the frequency of 800 in 3409965.

Advancing to step 1:
800 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 800

On to step 2:
34 divided by 800 is 0 with a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 34, we get 34.
Fetch the next digit (0) from the dividend, attach it to 34 and continue: 340 / 800

Step 3:
When dividing 340 by 800, we get 0 with a remainder of 340.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 340 and we're left with 340.
Bring next digit (9) of the dividend behind the 340 and repeat the process: 3409 / 800

Step 4:
3409 divided by 800 is 4 with a remainder of 209.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 3200 from 3409 and we're left with 209.
Append the next digit (9) from the dividend to 209 and continue with: 2099 / 800

On to step 5:
2099 divided by 800 is 2 with a remainder of 499.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Deduct 1600 from 2099 and we're left with 499.
Append the next digit (6) from the dividend to 499 and continue with: 4996 / 800

On to step 6:
800 can be fit into 4996 6 times, resulting in a remainder of 196.
Record the quotient 6 as the next digit in the result. 
Result so far: 426.0
Deduct 4800 from 4996 and we're left with 196.
Append the next digit (5) from the dividend to 196 and continue with: 1965 / 800

Moving on to step 7:
800 goes into 1965 2 times with a remainder of 365.
Write down 2 as next digit of the result. 
Result so far: 4262.0
Subtract 1600 from 1965 to get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Let's proceed to step 8:
The number 800 fits into 3650 4 times, leaving a remainder of 450.
Put 4 as the next digit of the answer. 
Result so far: 4262.4
If we take 3200 away from 3650, we end up with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Going ahead to step 9:
The number 800 fits into 4500 5 times, leaving a remainder of 500.
The next digit of our result is 5. 
Result so far: 4262.45
If we subtract 4000 from 4500, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 10:
800 goes into 5000 6 times with a remainder of 200.
Put 6 as the next digit of the answer. 
Result so far: 4262.456
If we take 4800 away from 5000, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 11:
If we divide 2000 by 800, we get 2 and a remainder of 400.
Write down 2 as next digit of the result. 
Result so far: 4262.4562
Subtract 1600 from 2000 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 12:
The number 800 fits into 4000 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 4262.45625
If we subtract 4000 from 4000, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 13:
800 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4262.45625
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 14:
800 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4262.45625
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 4262.45625 with a remainder of 0.0.