The original formulation of Zipf's law was based on naturally occurring word frequencies and their rank order in a given English language corpus. For one example, merely 135 words accounted for 50% of the total word frequencies. This could be extended to phrases as well. For foreign language learners, this means that there is some limited set of words and phrases which account for a large percentage of word and phrase occurrences.
(Unfortunately these frequency lists are usually based on corpuses which have little to do with the task of learning, that is actually useful/usable words based on frequency of practical, everyday use -- that is, a verbal corpus.)
Nevertheless, provided with an effective list, if we leverage the mnemonic tools previously discussed, we can spend time to create a set of entry level learning tools which will be extremely relevant (and therefore worth the time in creating).
Suggested Techniques for Second Language Acquisition
For given words and phrases identified