Looking on the internet deeply has found these results:

it should be is the most popular phrase on the web.

it should only be 1213,000 results on the web	it should be 1345,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Feb 11, 2015 ... According to the help on this function, it should only be resolving lock 02 21T23:53:54Z — #1. I'm having ... Export dae creates hundreds of duplicate materials when it should only be one · Technical Problems. epictard2222 — 2015 update should both resolve and update existing modules to newer ... 10 July 2014, Rome – “Poverty should not belong to any human society, it should only be seen in museums, ” Nobel Laureate Professor Muhammad Yunus said ...	Okay, Hailey, now it should be ready. Whoever did it should be prosecuted. This makes the word plural when it should be singular. Police scanner said it should be right about... here. But I guess it should be more than this. Your courage, it should be celebrated. For all of us, it should be everything. As it constitutes a relevant justification for the proposal, it should be repeated in the recitals.

it should only be

1213,000 results on the web

it should be

1345,000,000 results on the web

More popular!

Feb 11, 2015 ... According to the help on this function, it should only be resolving
lock
02
21T23:53:54Z — #1. I'm having ...
Export dae creates hundreds of duplicate materials when it should only be one · Technical Problems. epictard2222 — 2015
update should both resolve and update existing modules to newer ...
10 July 2014, Rome – “Poverty should not belong to any human society, it should only be seen in museums, ” Nobel Laureate Professor Muhammad Yunus said ...

Okay, Hailey, now it should be ready.
Whoever did it should be prosecuted.
This makes the word plural when it should be singular.
Police scanner said it should be right about... here.
But I guess it should be more than this.
Your courage, it should be celebrated.
For all of us, it should be everything.
As it constitutes a relevant justification for the proposal, it should be repeated in the recitals.