We're dividing 408603 by 60 
The aim is to understand the frequency of 60 in 408603.

Going ahead to step 1:
When dividing 4 by 60, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 60

Let's proceed to step 2:
The number 60 fits into 40 0 times, leaving a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Bring next digit (8) of the dividend behind the 40 and repeat the process: 408 / 60

Going ahead to step 3:
When dividing 408 by 60, we get 6 with a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 360 from 408 and we're left with 48.
Append the next digit (6) from the dividend to 48 and continue with: 486 / 60

On to step 4:
When dividing 486 by 60, we get 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Subtracting 480 from 486 leaves us with 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 60

Step 5:
60 divided by 60 is 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 681.0
Subtracting 60 from 60 leaves us with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 60

On to step 6:
3 divided by 60 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 6810.0
If we subtract 0 from 3, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
60 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 6810.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
60 can be fit into 300 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 6810.05
The remainder is 0 after subtracting 300 from 300.
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 9:
0 divided by 60 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6810.05
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 10:
60 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 6810.05
If we subtract 0 from 0, 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.

The final outcome is 6810.05, with a leftover of 0.0.