The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. 
How many orders were delivered in less than three days?
Definitions:
Tissue
Groups of similar cells and their extracellular matrix from the same origin that together carry out a specific function.
Neuroglial Cells
Non-neuronal cells in the nervous system that provide support, nourishment, and protection for neurons.
Neuromuscular Junction
A synapse between a motor neuron and a skeletal muscle cell, where electrical signals or impulses are transmitted to initiate muscle contraction.
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