The phrase "difficulty to do" is correct and usable in written English.
You can use it to refer to the difficulty of performing a task. For example: "The team was met with considerable difficulty to do the job in such a short timeframe."
The Diaries he kept in the Seventies are a detailed chronicle of other difficulties, to do with the National's early days: policy twists (the idea of amalgamating the RSC and the National recurs), financial worries, a rancorous press.
These applications usually store massive amounts of data which cause difficulties to do the task of clustering on entire dataset.
This brave and honest step will encourage the thousands with similar difficulties to do the same.
Bancroft found that men more often complained of physical difficulties to do with erection and ejaculation, whereas women more often complained of lack of interest or pleasure in sex.
He said already there were no technological difficulties to doing CCS, just legal, political and other impediments.
aWithout any difficulty; With a little difficulty; With some difficulty; With much difficulty; Unable to do b P < 0.01 difference between capability and performance item.
Both "Item-Improved instruments" have five-response options: HAQ - "without any difficulty," "with a little difficulty," "with some difficulty," "with much difficulty," "unable to do"; PF-10 - "not at all," "very little," "somewhat," "quite a lot," "cannot do".
Legacy HAQ-DI items were originally prefaced with "Over the past week, are you able to...?" with four response options ("Without any difficulty, with some difficulty, with much difficulty, "unable to do").
The Legacy HAQ contains 20 items in eight categories (dressing and grooming, arising, eating, walking, hygiene, reach, grip and activities) with four response options: "without any difficulty," "with some difficulty," "with much difficulty," "unable to do".
Responses to each question were scored according to five grades of difficulty for a particular activity (Grade 0: no difficulty, grade 1: mild difficulty, grade 2: moderate difficulty, grade 3: severe difficulty and grade 4: extreme difficulty (unable to do)).
