They may have had more than one type of training. It depends on if you are using it as a countable or non countable noun. Both are acceptable in different contexts.
Nooooooo! The plural is 'training'. Unless you're a septic.
@hurricane_run started
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They may have had more than one type of training. It depends on if you are using it as a countable or non countable noun. Both are acceptable in different contexts.