A cell spends a very small portion of its cycle in the M phase, which is the phase of cell division.

Here's a breakdown:

* M phase (mitosis or meiosis) is the shortest phase of the cell cycle, and it includes nuclear division and cytokinesis.

* Interphase is the much longer phase where the cell grows, replicates its DNA, and prepares for division.

In general, the M phase accounts for about 5-10% of the total cell cycle time. This means that the cell spends the vast majority of its time in interphase.

Note: The specific duration of the M phase can vary depending on the cell type and the organism.