Looking on the internet deeply has found these results:

the main shortcoming of this technique is that is the most popular phrase on the web.

the main shortcomings of this technique is that 10 results on the web	the main shortcoming of this technique is that 134 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	above, the main shortcoming of this technique is that it computes a locally optimal policy assuming a fixed starting belief state, and this assumption is embedded ... ... absolute flux densities accurate to about 10 percent with a wavelength resolution of about 2 A. The main shortcoming of this technique is that the sky emission ... The main shortcoming of this technique is that it suffers from higher distortion for various lower payload with lower image quality and can be attacked by some ... The main shortcoming of this technique is that there is an inconsistency in the process of apportioning delays between the contractor and the employer, which ...

the main shortcomings of this technique is that

10 results on the web

the main shortcoming of this technique is that

134 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

above, the main shortcoming of this technique is that it computes a locally optimal policy assuming a fixed starting belief state, and this assumption is embedded ...
... absolute flux densities accurate to about 10 percent with a wavelength resolution of about 2 A. The main shortcoming of this technique is that the sky emission ...
The main shortcoming of this technique is that it suffers from higher distortion for various lower payload with lower image quality and can be attacked by some ...
The main shortcoming of this technique is that there is an inconsistency in the process of apportioning delays between the contractor and the employer, which ...