Hi, first of all, sorry, I’m not a native english speaker.
I’ve been testing many posting tools and times between each post, and I have to say that if you are looking for engagement you should probably post once a day,but if you want a higher followback ratio then you should post as many times as you can (max 15 post a day).
So if you are looking to have thousands of likes on each picture then just post max once a day and you should follow as many people as your accounts allows you (new vs aged accs).