2. Paulsen leaves 4/18. Davis hired 5/20. 32 days. (Hardt)
3. Davis exits 3/2. 18 days thus far. (Truax)
Note that there was likely less urgency when Davis was hired. Paulsen left so late in the cycle that most jobs had already been filled by late April/early May.
Susan "steps down" 1/14. Cecchini hired 2/6. 23 days. (Truax)
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Based on the above, I think 21-23 days would be a reasonable timeline estimate, which would theoretically mean a decision between March 23rd and March 25th.