6866873 divided by 450 
The aim is to understand the frequency of 450 in 6866873.

Advancing to step 1:
If we divide 6 by 450, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 450

Advancing to step 2:
450 can be fit into 68 0 times, resulting in a remainder of 68.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 68 after subtracting 0 from 68.
Append the next digit (6) from the dividend to 68 and continue with: 686 / 450

Moving on to step 3:
450 can be fit into 686 1 times, resulting in a remainder of 236.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 236 after subtracting 450 from 686.
Include the next digit (6) from the dividend after 236, then repeat: 2366 / 450

Step 4:
When dividing 2366 by 450, we get 5 with a remainder of 116.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 2250 from 2366 and we're left with 116.
Bring next digit (8) of the dividend behind the 116 and repeat the process: 1168 / 450

On to step 5:
If we divide 1168 by 450, we get 2 and a remainder of 268.
Write down 2 as next digit of the result. 
Result so far: 152.0
Subtract 900 from 1168 to get 268.
Grab the next digit (7) from the dividend, add it to 268, then carry on: 2687 / 450

Step 6:
When dividing 2687 by 450, we get 5 with a remainder of 437.
Put 5 as the next digit of the answer. 
Result so far: 1525.0
If we subtract 2250 from 2687, we get 437.
Append the next digit (3) from the dividend to 437 and continue with: 4373 / 450

Going ahead to step 7:
4373 divided by 450 is 9 with a remainder of 323.
Use 9 as the next digit of our solution. 
Result so far: 15259.0
Deduct 4050 from 4373 and we're left with 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Let's proceed to step 8:
The number 450 fits into 3230 7 times, leaving a remainder of 80.
Put 7 as the next digit of the answer. 
Result so far: 15259.7
If we subtract 3150 from 3230, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 9:
If we divide 800 by 450, we get 1 and a remainder of 350.
Write down 1 as next digit of the result. 
Result so far: 15259.71
If we take 450 away from 800, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 10:
450 goes into 3500 7 times with a remainder of 350.
Record the quotient 7 as the next digit in the result. 
Result so far: 15259.717
If we take 3150 away from 3500, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Moving on to step 11:
If we divide 3500 by 450, we get 7 and a remainder of 350.
Record the quotient 7 as the next digit in the result. 
Result so far: 15259.7177
Subtracting 3150 from 3500 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

After the division, we end up with 15259.7177 and a remainder of 0.0035.