adverbial phrases with AT

AT is by far the most common as a simple preposition.  AT is also used in adverbial phrases which we have listed in order of most frequent according to iWeb corpus and then given examples of their usage in sentences:

1 AT ALL 1232801

Maybe they weren’t thinking about anything at all.

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2 AT FIRST 403759

At first, 

I thought they worked for the government.

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3 AT ONCE 222526

Don’t everybody thank me at once.

I assure you I did.
Obey me at once.

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4 AT BEST 111972

And if this is your fault, 

she‘ll be found out 

and at best deported, 

and your family will be broken.

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5 AT PRESENT 83432

At present,

 I wouldn’t like to be in that boy‘s shoes.

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6 AT LAST 77484

At last, we meet.

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7 AT MOST 61078
8 AT LARGE 57046
9 AT RANDOM 36452
10 AT LENGTH 32751

Well, I can talk at length about that.

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3 part:

ALL AT ONCE 54444

I think Sarah threw a little too much information at David all at once.

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AT LONG LAST 7739

Because I see, at long last, what‘s wrong with the world.

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