Submissions that are sent for review are subject to a rigorous double-blind review process. At least two subject-matter experts will review submissions that pass the desk rejection phase.
Everyone involved in the review process will hold all information contained in the paper as confidential until publication. Once reviewers are obtained they are usually asked to submit their review within four weeks.
Unfortunately, the process of finding willing subject-matter experts to review submissions is getting more and more difficult. So, the process of securing reviewers often adds weeks to the total review process.