pm#modality_measure  e.g., pm#never is as an instance
  supertype:  pm#attribute_or_quality_or_measure  e.g., mass, mass unit, 1 kg, frequency, [2-3] hz, color, blue, speed, 1 m/s
  subtype:  pm#temporal_modality_measure
     instance:  pm#never  pm#rarely  pm#often  pm#always
  subtype:  pm#physical_possibility

No statement uses or specializes pm#modality_measure; click here to add one.