Mern search using regex for data type numbers and date

Question

Working on a project and doing a search for data in the database. The primary search is on year and date data type. But it's not working and telling me resources not found...

  // Search function
  const searchKey = search ? {
    "$or": [
      { model: { $regex: search, $options: "$i" } },
      { year: { $regex: search, options: 'i' } }
      // $regex: "/^" + search + "/"
    ]
  } : {}