Greasing:
Going by the blower manual table, it's going to be vaguely somewhere in the "ballpark" of between every 56-168 hours, depending on speed. However, a TM OEM may specify a different interval based on considerations of the particular equipment design. But, every 10 sounds a tad on the short side (unless you were referring to the initial oil side change).
Oil change:
Is highly dependent on the type of oil being used. Some blowers are initially filled with the synthetic the blower manufacturer recommends. Others are filled with a conventional non-detergent oil. You see below that calculating the interval can get a bit complicated. Often the OEM will consult with the blower manufacturer for a recommended interval after looking at temps and loading, taking also into account high-heat lobes, if present.