Счетчик слов на странице и проверка заголовков для SEO-оптимизации

{
    "@context": "https://schema.org",
    "@graph": [
        {
            "@type": "CollectionPage",
            "@id": "https://www.cadeauloos.nl/",
            "url": "https://www.cadeauloos.nl/",
            "name": "Originele cadeauboxen om Cadeau te Geven | Cadeauloos",
            "isPartOf": {
                "@id": "https://www.cadeauloos.nl/#website"
            },
            "description": "Cadeau nodig maar geen idee wat? Ontdek onze originele cadeauboxen. Met zorg samengesteld en perfect om iemand echt mee te verrassen",
            "breadcrumb": {
                "@id": "https://www.cadeauloos.nl/#breadcrumb"
            },
            "inLanguage": "nl-NL"
        },
        {
            "@type": "BreadcrumbList",
            "@id": "https://www.cadeauloos.nl/#breadcrumb",
            "itemListElement": [
                {
                    "@type": "ListItem",
                    "position": 1,
                    "name": "Cadeaus"
                }
            ]
        },
        {
            "@type": "WebSite",
            "@id": "https://www.cadeauloos.nl/#website",
            "url": "https://www.cadeauloos.nl/",
            "name": "Cadeauloos.nl",
            "description": "Originele cadeauboxen die cadeaus geven echt leuk maken",
            "potentialAction": [
                {
                    "@type": "SearchAction",
                    "target": {
                        "@type": "EntryPoint",
                        "urlTemplate": "https://www.cadeauloos.nl/?s={search_term_string}"
                    },
                    "query-input": {
                        "@type": "PropertyValueSpecification",
                        "valueRequired": true,
                        "valueName": "search_term_string"
                    }
                }
            ],
            "inLanguage": "nl-NL"
        }
    ]
}