words = 'Lorem ipsum dolor sit amet consectetur adipiscing elit Duis sed tortor quis ex malesuada tristique non a ante Proin sollicitudin nibh vel ullamcorper ullamcorper lorem tortor accumsan diam vitae commodo erat lorem ac turpis Aliquam et efficitur urna Cras viverra nec justo non placerat Vestibulum et ornare justo Quisque sit amet lacus ut erat congue pharetra Nullam sed tincidunt nulla non molestie dolor.'.split(' ')
counts = {}
for (let word of words) {
    word = word.toLowerCase()
    counts[word] = counts[word] ? counts[word] + 1 : 1    
}
sorted_desc = Object.entries(counts).sort((a, b) => b[1] - a[1])
console.log(sorted_desc[0])
console.log(sorted_desc.at(-1))
console.log(sorted_desc)