What is the test for reversing a finding of insufficient evidence in a sexual assault case?

conflicts; we look for substantial evidence. [Citation.]" [Citation.] A reversal for insufficient evidence "is unwarranted unless it appears 'that upon no hypothesis whatever is there sufficient substantial evidence to support' " the jury's verdict.' " (People v. Manibusan (2013) 58 Cal.4th 40, 87.)

A victim's statements provide sufficient evidence to support a conviction under section 288, subdivision (a), if the statements, "describe the kind of act or acts committed with sufficient specificity, both to assure that unlawful conduct indeed has occurred and to differentiate between the various types of proscribed conduct (e.g., lewd conduct, intercourse, oral copulation or sodomy). Moreover, the victim must describe the number of acts committed with sufficient certainty to support each of the counts alleged in the information or indictment (e.g., 'twice a month' or 'every time we went camping'). Finally, the victim must be able to describe the general time period in which these acts occurred (e.g., 'the summer before my fourth grade,' or 'during each Sunday morning after he came to live with us'), to assure the acts were committed within the applicable limitation period. Additional details regarding the time, place or circumstance of the various assaults may assist in assessing the credibility or substantiality of the victim's testimony, but are not essential to sustain a conviction." (People v. Jones (1990) 51 Cal.3d 294, 316 (Jones).)