These are words of the day from Merriam Webster that include primary and secondary stress.

Learn to identify where the primary and secondary emphasis is. This will allow you to identify the vowels that do not reduce and that you have to pronounce correctly.

• Click on the button before the syllable with the primary emphasis.
• But not only by the ear, study them using the button y Praat, record your imitation and let yourself decide when you already say it.
• You can watch videos from Youglish.com by pressing the button . Remember the facilities that it offers.
• And with the links to the dictionaries verify it.