How to Say "periods" in Spanish
The most common Spanish word for “periods” is “lecciones” — use 'lecciones' when referring to scheduled class times or distinct study sessions within a school or academic setting..
lecciones
lehk-SYOH-nes/lekˈsiones/

Examples
Hoy tenemos tres lecciones de matemáticas y una de historia.
Today we have three math lessons and one history lesson.
¿Cuántas lecciones quedan antes del examen final?
How many lessons are left before the final exam?
Plural of 'Lección'
The singular form is 'lección,' which ends in '-ción.' When making this word plural, you add '-es' and the accent mark disappears: 'lección' becomes 'lecciones.'
Incorrect Gender
Mistake: “Los lecciones”
Correction: Las lecciones. Remember that 'lección' is always a feminine word, so it must be used with feminine words like 'las' or 'estas.'
tiempos
tee-EHM-pos/ˈtjem.pos/

Examples
En aquellos tiempos, la vida era mucho más simple.
In those times, life was much simpler.
Recordamos los viejos tiempos con mucha nostalgia.
We remember the old times with a lot of nostalgia.
Estos son malos tiempos para la economía global.
These are bad times for the global economy.
Plural vs. Singular
While 'tiempo' (singular) often means 'time' or 'weather,' 'tiempos' (plural) almost always means historical periods, eras, or the general state of things.
momentos
/moh-men-tohs//moˈmentos/

Examples
Mi familia pasó por momentos muy duros el año pasado.
My family went through very tough times last year.
Hay que tener paciencia en estos momentos de incertidumbre.
One must be patient in these periods of uncertainty.
Verbs of Passing Time
This meaning often pairs with verbs like 'pasar por' (to go through) or 'vivir' (to experience) to describe enduring a phase.
Confusing 'momentos' and 'oportunidades'
Mistake: “Tuve muchos momentos de hacer eso (when meaning chances).”
Correction: Tuve muchas oportunidades de hacer eso. ('Momentos' is time; 'oportunidades' are chances.)
Confusing 'tiempos' and 'momentos'
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