Customized Taxonomy WP_Query for All Phrases in a Taxonomy?

Is there a simple technique to question for any posts that’s tagged with any time period from a specific taxonomy?

I do know this system:

$custom_taxonomy_query = new WP_Query( 
 array(
  'taxonomy_name' => 'term_slug',
 )
);

However I want to both move a wildcard rather than term_slug, or maybe simply an empty string. Then that will give me all posts which might be tagged by any time period in that taxonomy, not only one particular time period.

Thanks to your assist,
Dave