53958412 ÷ 450 
The aim is to understand the frequency of 450 in 53958412.

Moving on to step 1:
5 divided by 450 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 450

Advancing to step 2:
When dividing 53 by 450, we get 0 with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Bring next digit (9) of the dividend behind the 53 and repeat the process: 539 / 450

Moving on to step 3:
450 can be fit into 539 1 times, resulting in a remainder of 89.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 450 from 539, we get 89.
Bring next digit (5) of the dividend behind the 89 and repeat the process: 895 / 450

Step 4:
If we divide 895 by 450, we get 1 and a remainder of 445.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Deduct 450 from 895 and we're left with 445.
Take the next digit (8) from the dividend and append it to 445, then repeat: 4458 / 450

Let's proceed to step 5:
450 can be fit into 4458 9 times, resulting in a remainder of 408.
The next digit of our result is 9. 
Result so far: 119.0
If we take 4050 away from 4458, we end up with 408.
Bring next digit (4) of the dividend behind the 408 and repeat the process: 4084 / 450

On to step 6:
When dividing 4084 by 450, we get 9 with a remainder of 34.
Put 9 as the next digit of the answer. 
Result so far: 1199.0
Subtracting 4050 from 4084 leaves us with 34.
Take the next digit (1) from the dividend and append it to 34, then repeat: 341 / 450

Let's proceed to step 7:
450 goes into 341 0 times with a remainder of 341.
Use 0 as the next digit of our solution. 
Result so far: 11990.0
If we take 0 away from 341, we end up with 341.
Include the next digit (2) from the dividend after 341, then repeat: 3412 / 450

On to step 8:
If we divide 3412 by 450, we get 7 and a remainder of 262.
Write down 7 as next digit of the result. 
Result so far: 119907.0
The remainder is 262 after subtracting 3150 from 3412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Moving on to step 9:
When dividing 2620 by 450, we get 5 with a remainder of 370.
The next digit of our result is 5. 
Result so far: 119907.5
If we subtract 2250 from 2620, we get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 10:
If we divide 3700 by 450, we get 8 and a remainder of 100.
Use 8 as the next digit of our solution. 
Result so far: 119907.58
Subtract 3600 from 3700 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 11:
450 can be fit into 1000 2 times, resulting in a remainder of 100.
Put 2 as the next digit of the answer. 
Result so far: 119907.582
Deduct 900 from 1000 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 12:
450 can be fit into 1000 2 times, resulting in a remainder of 100.
The number 2 becomes the next digit in our result. 
Result so far: 119907.5822
Subtract 900 from 1000 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

After the division, we end up with 119907.5822 and a remainder of 0.001.